The answer is HIV. Hiv or human immunodeficiency is a virus that can weaken the body's immune system. Infection with HIV causes a life-threatening illness called AIDS also as immunodeficiency syndrome.
The hepatitis one...I think. if you know for sure I an wrong then it's definitely the first one about HIV
The Endocrine System regulates the body's metabolism, growth, and functions of the sexual organs. It consists of glands that secrete hormones directly to the circulatory system that are carried throughout distant target organs. This system is responsible for controlling the chemical functions of cells, tissues, and organs through the secretion of different types of hormones.
The Endocrine Systems includes the different glands (e.g. adrenal, parathyroid, thyroid, and pituitary), ovaries, pancreas, and testes.
Your heart is very important. the reason your heart is important because the heart keeps blood that's full of oxygen circulating through your body. the heart is also needed for survival, without one you would be alive today. The heart also sends blood around the body. The blood provides the oxygen and nutrients which is needed.
The answer is C. The endothelium on the inside of the artery.
