Immune System

A standard precaution applying to bloodborne pathogens is to wear non-latex gloves. It has to be non-latex because some people are allergic to latex so it has to be non-latex gloves.

thymus

It can potentially kill you or make you really ill.

Antigens are important because they trigger responses to pathogens by the immune system. Without them, no prevention against pathogens would take place.

Question is little bit confusing. Anyway I have an answer and hope it make sense to this question. Antibodies binds to a part of an antigen which is known as Epitope.

3. antibodies against usually harmless antigens

It runs throughout your body. The main part is the heart, which pumps blood through arteries that are in all parts of the body. Blood also goes to capillaries which are attached to organs and pass blood from the artery to the vein. Blood in these contain oxygen which is being brought to organs, and parts of the body. When they do not have oxygen anymore, they return to the heart in veins.
It is all over the whole body! The heart is only the pumping station!

There are four reactions when antibodies react with antigens:

agglutination, precipitation, neutralization or activation of complement.

Agglutination is the clumping process that you are looking for.

The difference between the first and second line of defence is that the first line of defence is your physical barrier like your skin and it protects you from most pathogens entering your body and the sweat and oil on your skin prevent some pathogens from growing on your body. the second line of defence is when a pathogen makes it past the first line of defence your body can mount an immune response to the attack and destroy the invader. Whether or not the response succeeds depends very much on your body's ability to distinguish between cells that belong to it and cells that do not.

for diseases to enter the body they must penetrate the skin

Immune system - the antibody IgE (immunoglobulin E) specifically.

Nails are a part of the integumentary system which also consists of hair and skin.

The Immune System is the defense network of the body. The immune system works with specific receptors on specialized cells - detecting foreign bodies and signaling for the immune system to destroy them.

It provides natural immunity by providing a barrier that keeps out pathogens and other harmful materials. It is slightly acidic which makes it a deterrent to bacteria. It secretes sebum which helps lubricate and coat the skin, providing an added layer of protection.

The left side of the heart is for to collecting oxegynated blood from the lungs, then pumps blood around your body.

The right side of the heart is for to collecting blood from the body, then so pumps blood to the lungs.

Observation and deductive reasoning. Smallpox was a scourge during Jenner's time, but he noticed that milkmaids contracted a very mild illness similar to smallpox called "cowpox", from which they recovered easily. He postulated that a tiny bit of the cowpox serum could be injected into a well person, and the mild cowpox might protect them from the deadly smallpox. It worked.

Pathogens spread from person to person in numerous ways. The influenza virus is transmitted through the air, usually via sneezing and coughing. Escherichia coli is transmitted via water, food, and blood. There are many more pathogens that can be transmitted by saliva, etc.

no it doesn't follow any of the criteria or postulates that define an infectious disease.

The primary organs in your immune system is usually your heart and lungs. However, all of the different organs have different functions and without them, the body simply wouldn't survive. That being said, these "primary organs" can sometimes be dysfunctional in a person's body, affecting their body enormously. The logic therefore is that all organs are important as each other, seeing as they all make significant contributions to the overall health of the body and are equally vulnerable to harm, but the heart for example is responsible for keeping the body alive. It's like a motor, which is considered the most important part of a car, but how can a car move without any tyres? Of course, this answer can be criticised as a bit too Functionalist

Part of the problem in the control of HIV is the fact that the virus mutates fast. When something changes, or mutates quickly, it is difficult to find a cure or a vaccine that will effectively control it.

its when you have a low platelet count and become at risk of bruising or bleeding. they dont know what causes it. it can go away fast or it can become chronic. its more common among infants and elders than teens and young adults. its no fun. :(

Mucus.

its role in defending your body against disease is to find and "eat" (consume i guess) bacteria, viruses, and dead or injured body cells

Phagocytes defend the body by destroy pathogens. They surrounding and engulfing them.

Natural immunity to chickenpox results from previous infection. There is no other way to be naturally immune to chickenpox. Sometimes, the previous infection may be mild enough that the disease was not noticed.

You can become artificially immune to chickenpox by getting chickenpox vaccine.

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