Webmd describes the anatomy of human blood including what makes up our blood and how circulation works.. Hemoglobin is the most important component of red blood cells. it is composed of a protein called heme, which binds oxygen. in the lungs, oxygen is exchanged for. A recurring pain or discomfort in the chest that happens when some part of the heart does not receive enough blood. it is a common symptom of coronary heart disease.

A blood type (also called a blood group) is a classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood. Causes. iron deficiency anemia. iron deficiency anemia occurs when the body lacks mineral iron to produce the hemoglobin it needs to make red blood cells.. What is anemia? anemia is a condition in which the body has fewer red blood cells than normal. red blood cells carry oxygen to tissues and organs.

Am i eligible to donate blood? find out if you are eligible and learn more about the donation process. get started >. Every 8 minutes the american red cross responds to an emergency. support the red cross. join us today by making a donation.. Question: what are the symptoms of high blood sugar that might indicate i have diabetes? answer: first of all there may not be any symptoms of high blood.

Every 8 minutes the american red cross responds to an emergency. support the red cross. join us today by making a donation.. Hemoglobin is the most important component of red blood cells. it is composed of a protein called heme, which binds oxygen. in the lungs, oxygen is exchanged for. What is anemia? anemia is a condition in which the body has fewer red blood cells than normal. red blood cells carry oxygen to tissues and organs.