This is a free sample excerpt of the paper. Join to view the full essay
|
The Immune System
Part 1 of Paper
....armful invaders.
provides protection against a variety of potentially damaging substances that
can invade the body. These substances include disease-causing organisms, such
as bacteria, fungi, parasites, and viruses. The body's ability to resist these
invaders is called immunity. A key feature of the immune system.... Part 2 of Paper
.... together with the complement system. The human
immune system contains approximately 1 trillion T cells and 1 trillion B cells,
located in the lymphoid organs and in the blood, plus approximately 10 billion
antigen-presenting cells located in the lymphoid organs. To maximize the chances
of encountering antigens wherever they may invade the body, lymphocytes
continually circulate between the blood and certain lymphoid tissues. A
lymphocyte spends an average of 30 minutes per day in the blood and.... |
| Number of words: 732 - Approximate pages: 3 |
|
Here are PaperHelp we are used to dealing with students in a rush to complete their research papers on a tight deadline. That is why when you
join our site, your account is activated immediately enabling you to get the information you need as quickly as possible. We also know that
students usually are on a tight budget, which is why we give you access to a large number of papers, 45,000+ to exact, for one low monthly
price. With so many essays available, there is a very good chance you'll be able to find what you need. So join today and get your paper
done.
| Length |
Membership Type |
Price |
Register |
| 30 days |
recurring |
$19.95 |
| 90 days |
recurring |
$39.95 |
| 180 days |
non-recurring |
$69.95 |
|
|
|
