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Circulatory System
Circulatory System is the category for questions about the human circulatory system, including questions about the human heart, arteries, and veins.
2,116 Questions
How bacterial endocarditis effects the circulatory system?
Bacterial endocarditis is infection of the inner lining of the heart caused by bacteria. People with serious valve disease are at greater risk for bacterial endocarditis.
What is the skeleton of the heart composed of?
This question is asking about the overall makeup of the heart and its structures which refer to its "skeleton":
It consists of rings of connective tissue that surrounds the pulmonary trunk and aorta at their proximal ends. It provides firm attachments for heart valves and muscle fibers.
Why are the heart and lungs so important to the human body?
Beacause the Heart pumps blood & oyxgen throughout your body, & your lungs use oxygen to keep your heart beating. If you want more information about this subject, you should probably ask your doctor. They would know this.
It is not the blood but the veins that "look" blue, and even then it is not the actual color of the vessel. The difference is in the way colored light moves through the tissues, and how the eye perceives those colors of light.
The oxidation state of the iron in the hemoglobin determines it's color; when the blood is oxygenated, the iron's oxidation state changes, changing the color of the blood from dark red to light red. It is never blue.
The changes in blood coloration relate to the respiratory pigment, hemoglobin. Hemoglobin is a topologically complex molecule that very readily binds to oxygen. Once the molecule is fully saturated, it reflects in the crimson red spectrum, and therefore fully oxygenated blood appears to be bright red.
After the hemoglobin molecule gives up its oxygen to tissue that needs it, the molecule becomes much less reflective, and thus deoxygenated blood appears very dark red to purple. But blue is used in charts and diagrams to contrast against red, red being the arterial system bearing O2 and blue being the "deoxygenated" blood in the venous system.
Human blood is always red. It can have different hues of red, but it is still red.
What blood vessel leaves the heart to pick up oxygen?
ARTERIES ALWAYS take blood AWAY from the heart.
What is the volume of the blood pumped by the heart per minute?
Your heart pumps about five liters of blood per minute. This is also called as cardiac out put. In severe exercise the cardiac out put can increase up to twenty five liters per minute.
Resting heart pumps about five liters of blood per minute. In severe exercise the heart can pump up to twenty five liters of blood per minute.
What carries blood toward the heart and have thinner walls?
The 2 modes of blood transport are the veins and arteries.
The way I use to remember is A is for away, so therefor arteries take blood away from the heart and veins go to the heart.
Veins NORMALLY carry oxygen poor blood
&
Arteries NORMALLY carry oxygen rich blood
Which layer of the pericardium is found closest to the heart itself?
Epicardium or inner layer of serous pericardium is the innermost layer of pericardium.
Why the aorta is the thickest wall vessels in the circulatory system?
aorta has to withstand high blood pressure because of which it needs thick walls !!
Where can you find a simple diagram of the heart?
One can find instructions on how to draw a heart with wings from a wide variety of sources, including the art section of ones local library. One can also find this information via online streaming websites such as YouTube. YouTube will offer instructional videos on how to draw a heart with wings.
Keep a one way flow through the heart?
It is important for blood to flow in one direction in the heart because blood can't flow backwards because it has oxygen rich blood and poor oxygen rich blood and these to types of blood cannot mix :)
How does the blood pumped from the heart to the rest of the body and back again?
The heart sends deoxygenated blood to the lungs, via the pulmonary arteries - thus this system is called the pulmonary circuit
De-oxygenated blood flows from right ventricle of heart to lungs through two pulmonary arteries for oxygenation. After oxygenation the blood now travels through the pulmonary veins to left auricle of heart. Two pulmonary veins from each lung reach the heart making a total of four pulmonary veins. This circulation of blood to and from lungs is called pulmonary circulation. The pulmonary vein is thus the only vein which carries oxygenated blood and pulmonary artery in the same way the only artery to carry deoxygenated blood.
Why is it said that the earthworm has a closed circulatory system?
It only has one flow of blood.
We have two flows of blood, one for the lungs and one for the body. This also means the worm will only have two heart chambers while you have four.
P.S. This is the third question on circulation i have answered today, is this someone typing in all their homework questions?
What are the similarities between circulatory system and nervous system?
They are both principally composed of special interconnected cells called neurons and are both involved in the coordination of multiple bodily functions, by conducting the great variety of stimuli (both within the nervous tissue as well as from and towards most of the other tissues).
The heat pumps and sends the blood to different parts of the body. The heart beating looks like the pump.
What order does the circulatory system work?
r atrium r ventricle pulomanry artery lung capillaries pulmonary vein l atrium l ventricle aorta
What is the length of the cardiac cycle if the heart rate is 80 beats per minute?
To find your answer, your first step is to divide the time (in this case a minute...a minute equals sixty (60) seconds) by the heart rate (e.g. 80 beats). So---60 divided by 80 will give you 0.75 seconds. Your answer will justify the time/length of the cardiac cycle.
What is the difference between a chameleon circulatory system and a human circulatory system?
- fishes - 2 chambered heart with sinus venosus and conus arteriosis
- human - 4 chambered heart
What is responsible for initiating the heartbeat?
There is a group of cells in the heart called the "pacemaker" that sends out a nerve shock to initiate a heartbeat. It also changes the pulse depending on certain external conditions to maintain homeostasis.
-Richard
Which cardiac structure control blood flow to the heart?
The semilunar valves control the flow of blood from the heart. The aortic semilunar valve controls the flow of blood from the left ventricle to the aorta, and the pulmonary semilunar valve controls the flow of blood from the right ventricle to the pulmonary artery.
Pulmonary valve
Trace blood flow from heart to spleen?
Aortic arch to descending thoracic aorta to abdominal aorta to celiac trunk to splenic artery
