HIV is a virus that gradually attacks the immune system, which is our
body’s natural defence against illness. If a person becomes infected
with HIV, they will find it harder to fight off infections and diseases.
The virus destroys a type of white blood cell called a T-helper cell
and makes copies of itself inside them. T-helper cells are also referred
to as CD4 cells.1
AIDS stands for Acquired Immune Deficiency Syndrome:
Acquired means you can get infected with it;
Immune Deficiency means a weakness in the body's system that fights diseases.
Syndrome means a group of health problems that make up a disease.
AIDS is caused by a virus called HIV, the Human Immunodeficiency Virus. If you get infected with HIV, your body will try to fight the infection. It will make "antibodies," special immune molecules the body makes to fight HIV.
<span>What's puberty ?
As children approach their early teens, puberty begins. These are the changes that will lead to adulthood, and the ability to have children.
The developments affect the body in terms of size, shape, and composition, as well as internal body systems and structure. Psychological and social changes also take place. Boys and girls grow rapidly in the first half of puberty, and they stop growing when puberty is completed.
Hormone signals from the brain will tell the body that it is time for puberty to start. The signals will go to the ovaries in females, and the testes in males.
In response, the ovaries and testes produce a range of hormones that stimulate growth and change in various parts of the body, including the reproductive organs, breasts, skin, muscles, bones, hair, and the brain.
</span>
The answer is false. Bulimia can do damage to the esaphogus and other parts of alimentary system.
Answer:
C. The runner should sprint as fast as possible to the finish line.
Explanation:
HIT Stands for high intensity training. Hope this helps correct me if I’m wrong. :)
Answer:
Specifically, he observed that “the lower plants all consist of one cell, while the higher ones are composed of (many) individual cells.” In 1839 Theodor Schwann extended Schleiden's cell theory to animals.
Explanation:
