How much is the minimum required blood platelet in a human body?
it varies. Anything below 150K is considered low. However, people can live without spontaneous bleeding with platelet counts as low as around 10K. There are minimum counts that are needed for certain procedures and this depends on how invasive the procedure is. For instance, something like a joint injection is ok to do at lower levels of platelets than say, open abdominal surgery.
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Answered
How much of the Human body is made of blood cells?
Blood makes up about 1/12 of body weight. As there are 12-16 grams of haemoglobin per 100g of blood, the weight of blood cells based on body weight is 1%. So yes but its made …up of many other things too like tissue and white blood cells. (MORE)
Answered
What happens when the human body loses to much blood?
Blood loss creates negative effects, in stages. It drops the blood pressure as blood volume decreases. It causes dizziness, and the person can black out / pass out. The heart …still tries to perfuse (push blood) to vital organs and the brain, but as the body continues to lose blood the circulatory system reacts by clamping down on flow to the extremeties in order to keep the brain, heart, and vital organs perfused. As one vital organ, the kidneys are also easily damaged and can be damaged by poor perfusion. If blood volume is not quickly restored, brain cells can die. The heart and lungs are two of the last places perfused (unless the injury is to those two organs). Eventually, with enough blood loss and without external replacement via blood transfusion, the person will die. In major injuries especially to major organs, or if an artery is cut, death from blood loss can occur in very few minutes. (MORE)
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In Health
What does platelets do in the blood?
They are responsible for blood clotting. This prevents too much blood loss and to some extent prevent the entry of pathogens into the body through the cut/wound.
In Facts
10 Weird Facts About The Human Body
It is often said that the human body is a miracle of nature. Fortunately, it is also a miracle of weirdness. There are any number of things you probably didn't know about your…self and how unique, incredible and odd you truly are. Here are ten things that make your body (MORE)
In Stages
Understanding the Primary Functions of the Pancreas in the Human Body
The pancreas is a vitally important organ in the human body. The word "pancreas" is a derivative of two Greek words meaning "whole" and "flesh." It is responsible for producin…g digestive juices, managing blood sugar levels and regulating liver function. Learn about the primary functions the pancreas performs in the human body, and take steps to keep your pancreas healthy.The pancreas is a gland situated above and behind the stomach on the left side of the body. It is 5 to 7 inches long and is part of both the endocrine and digestive systems. It has a shape somewhat like a pistol and is made up of thousands of glandular cells which secrete up to 2 liters of digestive fluids per day.The pancreas plays a crucial role in healthy digestion and blood sugar regulation. It acts as a digestive organ by breaking down carbohydrates, lipids, proteins and enzymes in foods. As an endocrine gland, it secretes glucagon and insulin to regulate and control blood sugar levels.Insulin and glucagon are antagonist hormones, meaning they perform opposing functions. The pancreas releases insulin when blood sugar is too high and glucagon when levels are too low. Insulin signals the brain to transport sugar from the foods consumed into the cells. It also signals the liver to stop producing sugar of its own. When blood sugar levels are low, the pancreas releases glucagon, which the liver metabolizes into glucose and releases into the bloodstream for the body to use as energy.Alcohol, animal fats, smoking and stress are damaging to the pancreas. To maintain optimal pancreatic functioning, avoid alcohol and cigarettes, eat a healthy diet and manage your stress properly. Engage in regular exercise and maintain a healthy body weight. Relaxing, stress-reducing exercises, such as yoga and tai chi, are especially helpful.The pancreas plays an important role in the human body. Protect your pancreas by eating a healthy diet, avoiding excessive alcohol consumption and managing stress levels. Pain or inflammation in the area of the pancreas requires an immediate medical examination. Pancreatic trauma and trauma may result in the release of caustic digestive enzymes into the bloodstream.One out of every 78 people are at risk for developing pancreatic cancer. Risk factors include advanced age, diabetes, stress, cirrhosis of the liver, family history of pancreatic cancer, obesity, lack of physical activity, stomach problems and chronic pancreatitis. (MORE)
In Anatomy
Middle School and High School Human Body Systems Tests
Many students have to take human body systems tests sometime in their schooling. Often the basic ideas are introduced in elementary school and then that knowledge base is incr…eased throughout a child's schooling. By the time the child is in high school they should be able to describe each of the many body systems and give details on each one. ProProfs offers a 15 question human body systems test which is appropriate for middle school students who want to test their knowledge of human body systems. On each question students are expected to choose the best answer from four possible answers. Questions cover the endocrine, excretory, muscular, digestive, and nervous systems. Many of the questions focus on the body's ability to stay warm or cool. The 12 question test is designed to accompany the sections of McGraw-Hill Life Science: Human Body Systems Book D, although others studying human body systems may find the quizzes useful. By following the links on the left hand side under Chapter Activities, quiz takers can easily move between the different quizzes. Each question is accompanied by a hint to help quiz takers figure out the right answers. Anatomy Universe offers several human body system tests for more advanced students. Some of the tests offered cover the skull, brain, vertebrae, and heart. Each quiz also has a full color photo of the body system in question with different parts labeled. By clicking on the link that says review, the viewer can arrive at a detailed diagram with different parts clearly labeled. The University of Minnesota site is loaded with self-tests, timed tests, and quiz bowl tests. Some of the topics covered include the bones as well as the cardiovascular, respiratory, digestive, and reproductive systems. If the student gets tired of quizzes, the site also has several games connected to the human body systems. From the site viewers can link to the anatomy page of the university. Biology Corner has 19 quizzes on the human body systems. When using links from the site viewers can find information on many different topics in biology. The quizzes are geared to students in high school biology classes. A St. Louis area teacher operates the site which is frequently updated. Human body systems tests help the student determine where they still need to develop their knowledge. When a student prepares and studies well they will be ready for advanced classes and for college courses. When looking for human body system tests make sure to look at the level of the quiz. These sites are also a great resource for increasing your general knowledge of the human body. When you are preparing for a quiz or test, it helps to get a great night's sleep the night before the test. Cramming at this time is usually counterproductive. (MORE)
In Well Being
Fun Facts About the Human Body
The human body is as mysterious as it is majestic. There are many things about it that many people don't know, and we've rounded them all up in one article. Come inside to che…ck them out!Did you know that the amount of hair follicles in your head is directly related with the color of your hair? if you're blonde, you can have up to 146,000 hair follicles. On average, redheads have the least amount of hair follicles with an average of 85,000.Did you know that the more you use your nails, the faster they grow? That's why the nails in your hands grow faster than the nails in your toes. Also, the nails in the hand you write with grow faster than on your other hand. Crazy, right?Snores can be as loud as 60 decibels, while the heavy snorers can reach a noise level of 80 decibels. To put it in perspective, 85 decibels is considered dangerous to a human's hearing. So if you sleep with someone who snores, wear ear muffs!Body odors are generated by sweat. Did you know our feet have 500,000 sweat glands, making it completely possible to produce a pint of sweat on a daily basis? Those are some smelly feet right there...Memories can be triggered by familiar scents, and that's because our brains can remember up to 50,000 scents! Think about it: how many times has a scent brought up a childhood memory?Right now, your head makes up one eight of your body. When you're a baby, your head is one fourth of your body. No wonder they have a hard time keeping their heads up!If stretched from the floor to the sky, our small intestines would be more than four times taller than us! It's funny how it manages to stay so compact inside our tummies!We were all born with 350 bones in our bodies. As we grow into adulthood, many of these bones merge leaving us with a total of 206 bones in the end.Just like your fingers, your tongue print is completely unique! It's not common practice, but it could be used to identify people, just like fingerprints do.There are about 32 million bacteria on every single square inch of skin in the human body. Don't worry, most of them are harmless.Sneezes aren't only annoying... they're freaky fast! An adult's sneeze can travel at more than 100 miles/hour. "Germs... attack!"More than 2,000 gallons of blood are pumped through the body's blood vessels on a daily basis. That's a lot of blood!No, we're not snakes, but we do shed skin like they do! Every year, a human sheds around 1.5 pounds of skin particles.Twice a week, your body replaces its stomach lining to avoid the acids in your stomach from digesting itself!On average, a person produces 25,000 quarts of saliva per lifetime. That's enough saliva to fill two pools! (MORE)
In Well Being
6 Urban Legends About the Human Body
Growing up, your mother likely told you to not do something because it would cause permanent damage. Many of these were simply urban legends that are far from the truth.Many a…thletes, especially those from the 1950s and 1960s, believed that having sex before an athletic event would hurt your performance. However, it has been found that sex helps people relax, which helps to alleviate anxiety levels.Sitting too close to the television will not hurt your eyes. It may cause eyestrain, which makes children develop the habit of holding reading materials close to their face.Teeth coloring varies on person, but should not be pure white. A tooth's natural color is actually yellow, and white has only become the norm because of whitening and bleaching technologies. Certain foods, such as wine and coffee, increase the chance of staining your teeth.Studies have shown that a multitude of factors contribute to acne inflammation, including dairy. And while most chocolate treats also include dairy products, there are so many other factors in play it's nearly impossible to pinpoint the chocolate as the cause.It's estimated that approximately 81 percent of the population can roll their tongue. This common talent does not come from a gene like people previously thought.Even though we've all been encouraged to avoid cracking knuckles because "it causes arthritis", no study has ever directly linked the two.No matter what sickness you're suffering, your body needs the nutrients of a balanced diet to help your immune system fight it off. Overeating or undereating isn't going to help you get better any faster.Okay, carrots CAN help certain eye conditions a bit, but only if they are directly caused by a vitamin A deficiency. And carrots aren't the only vegetable that can help with this. Still, carrots are a good source of a variety of vitamins and nutrients, so you should still work them into your diet.Cells die at different rates after death. Even so, nails and hair cannot grow without glucose. Without any cell growth, glucose can't form, and because of this, nails and hair cannot grow after death despite urban legends saying otherwise.It was commonly believed that having flat feet resulted in more injuries, just from walking. However, people with flat feet aren't more likely to get injuries than someone with a high arch. Orthopedic inserts in your shoes can help to resolve flat feet and make standing and other activities more comfortable.This is totally false. People believe that if they shave their heads completely, the new hair that grows will be thicker and even curlier. This is completely false. Your hair is your hair, and no matter how you cut it, it will grow in the exact same way.We've all heard this phrase, but it is not true. It would be hard to focus on anything else if men really thought about sex every 7 seconds. Though Contrary to popular belief, we do use all of our brain. However, we only use 10% of it at any given point in time. The 10% we use varies depending on what we're doing. (MORE)
14 Human Body Parts Made by a 3D Printer You Just Need to See
A lot of people have demonized 3D printing as of late and a lot of media hype focuses on its military applications. However, 3D technology has also inspired medical applicatio…ns that have since worked to save and improve the lives. This is especially true in medical situations where a patient needs a replacement body part or when doctors need to see a 3D printout of a diseased body part.In October 2014, a 3D printout of the heart of a 2-week old baby suffering from coronary heart disease (CHD) helped doctors develop a strategy on how to fix it. Surgeons at the Morgan Stanley Children's Hospital in New York City printed the heart from MRI scan data taken earlier. What usually was a complicated and dangerous surgery became easier for the doctors because of the 3D printout of the baby's heart.A 3D bioprinter developed at the Wake Forest Institute of Regenerative Medicine may be able to create replacement kidneys from the patient's own kidney cells. The 3D bioprinter prototype deposits various kidney cells in biodegradable scaffolding, which will then be transplanted into the patient. As the scaffolding biodegrades, the body will form tissue around it creating what is essentially a functioning kidney.Researchers at Cornell University have fabricated living heart valves from living tissue through 3D bioprinting technology. Although replacing heart valves with prosthetics is a standard among adults, the procedure is not suitable for younger adults and growing children. Living heart valves through 3D bioprinting mimics important behaviors of the native valve, which makes it a much better alternative to both adults and growing children.Researchers at the Washington State University have created replacement bones made from a combination of ceramic and plastic binding using a 3D metal printer. Medical professionals have since created replacement bones such as the upper hip stem and ball joint, vertebra, femur, and parts of the skull and used them successfully on patients.Another 3D bioprinting technology to come out of Cornell University is the artificial human ear that has the same look and feel of a natural ear. More than just a prosthetic, the 3D printed ear is created from living tissue set on a scaffolding made of collagen that will slowly biodegrade and be replaced by your own cartilage. Children born with congenital anomaly will benefit from this kind of technology.Accident victims who suffered facial disfigurement are already benefiting from 3D printed noses. In 2013 a New Zealander won an award for designing a replacement nose with a shock-absorbing base using a 3D printer.The 3D printer can also print out a natural looking prosthetic thumb. A man who refused to pay $5,000 for a thumb made by a prosthetic limb company created the prosthetic thumb shown here. Using his own 3D printer, he printed his own prosthetic thumb for only $25.An elderly female patient developed a chronic bone infection of the lower jaw and its removal was the only option. As a replacement, a specialized metal parts company based in Belgium created a titanium jaw based on the designs from the Biomedical Research Institute at Hasselt University. The successful jaw replacement surgery was carried out in June 2011.As of 2014, the use of 3D printing in the field of ophthalmology has been limited to creating prosthetic eyes. Researchers at the University of Cambridge, however, have successfully 3D bioprinted adult eye nerve cells in 2013. This development may very well lead to using 3D printing as a cure for blindness.The use of 3D printers to create novelty replicas of human faces has become commonplace. More than just for bobble-heads however, 3D printing technology has also been used to reconstruct faces that were disfigured in accidents, as in the case of Stephen Powers shown on this photo.The Wake Forest Institute for Regenerative Medicine is developing 3D bioprinting technology to print living skin tissue directly on the wound. The bioprinter ejects enzymes, living cells, collagen, fibrinogen, human fibroplasts, and skin cells called keratinocytes. Ultimately, researchers a Wake Forest plan building a portable version for battlefield or emergency situation applications.Researchers from MIT, the University of Pennsylvania, Harvard, and other research institutes have developed a way to create a complex network of blood vessels using a 3D printer. First, the researchers use 3D printer to create a simulated mold of blood vessels using sugar filaments. The researchers then treat the mold with human tissue cells. Once the tissue have set, the researchers then dissolve the sugar with water leaving behind a network of blood vessels made with living tissue.Sixteen-month-old Garret Peterson suffered a condition called tracheomalacia, a condition that weakens his trachea, causing his lung to collapse. His doctors commissioned the 3D printing lab of the University of Michigan to fabricate a tracheal splint for him. The doctors successfully transplanted the tracheal splint into Garret and it will be remain there until his trachea has become strong enough.Dr. Rocky Tuan and his team of researchers from the University of Pittsburgh have successfully created living human cartilage tissue using a 3D bioprinter. Dr. Tuan used human stem cells to build the layers needed to create the cartilage tissue. They hope that this 3D printing technology will soon enable medical professionals to create replacement cartilage for people suffering from arthritis and rheumatism. (MORE)
Answered
What is the function of red blood cells white blood cells and platelets in the human body?
red blood cells transport oxygen in the human body. white blood cells are usually phagocytic, ie, they engulf foreign bodies and fight infections. [basophils are involved in i…nflammatory responses,eosinophils are associated with allergic reactions etc]. platelets are involved mainly in blood clotting. (MORE)
Answered
How much blood is in a human body?
8-12 pints depending on the size of the person. Actually about 5 litre of blood is present in a normal human body It varies by age and weight, but the "standard" a…nswer is 6 liters, or about a gallon and a half. (MORE)
Answered
How do platelets function in the human body?
Platelets contain clotting factors that cause them to stick together, which stops bleeding from an opened blood vessel by solidifying the blood (hemostasis). Platelets al…so carry the growth factors (PDGF) that stimulate the growth of new blood vessels, which is called angiogenesis. (MORE)
