CK12 Life Science

plasma The straw-colored fluid in blood. pulmonary circulation The part of the cardiovascular system which carries oxygen-poor b ...

that blood first enters. Aventricleis one of the two muscular V-shaped chambers that pump blood out of the heart. The four chamb ...

The Heartbeat To move blood through the heart, the cardiac muscle needs to contract in an organized way. Blood first enters the ...

cells send electrical messages calledimpulsesto other muscle cells. The impulses then reach the AV node. The AV node is found in ...

Figure 18.13: The right side of the heart pumps deoxygenated blood into the pulmonary circulation; the left side pumps oxygenate ...

Coronary Circulation Just like every other organ in the body, the heart needs its own blood supply. It gets this blood in thecor ...

William Harvey. In 1616, Harvey first described the pulmonary and systemic circulation systems in detail. Lesson Summary The he ...

Vocabulary atrioventricular (AV) valves Valves that stop blood from moving from the ventricles back into the atria. atrium One o ...

Introduction Did you know that blood is a tissue? Blood is a fluid connective tissue that is made up of red blood cells, white b ...

Figure 18.15: A scanning electron microscope (SEM) image of human blood cells; red blood cells are the flat, bowl-shaped cells, ...

White Blood Cells White blood cells(WBCs) are usually larger than red blood cells. They have a nucleus but do not have hemoglobi ...

Platelets Plateletsare very small, but they are very important in blood clotting. Platelets are not cells they are sticky little ...

your body temperature is increasing, it sends messages to the blood vessels in the skin to increase in diameter. Increasing the ...

blood would attack the A antigens on the RBCs in the donor blood, as shown inFigure 18.19. The antibodies would cause the RBCs t ...

Table 18.2:Blood Types, Antigens, and Antibodies Blood type Antigen type Plasma anti- bodies Can receive blood from types Can do ...

Figure 18.20: The RBCs of a person with sickle cell disease (left) are long and pointed rather than straight like normal cells ( ...

Table 18.3: Food Milligrams (mg) of Iron Canned clams, drained, 3 oz 23.8 Fortified dry cereals, about 1 oz 1.8 to 21.1 Roasted ...

SomeWBCsswallowpathogens, andothersproduceantibodiesthatattackanddestroy pathogens. Blood type is determined by the presence or ...

anemia The condition of not having enough hemoglobin in the blood to carry oxygen to body cells. antibodies Proteins that identi ...

universal donor A person with type O positive blood; type O RBC do not have any antigens on their membranes and so would not cau ...