Anatomy Ch Journal

What is the composition of blood? Plasma 55% (mostly water) Formed elements 45% –Erythrocytes (red) –Leukocytes (white) –Platelets (clotting)

What color is blood? –Oxygen-rich blood is scarlet red –Oxygen-poor blood is dull red

What are the four main blood types? A B AB O

What is an embolus? A thrombus that breaks away and floats freely in the bloodstream that can later clog vessels in critical areas such as the brain.

What is RhoGAM? The immune serum used to prevent maternal sensitization to Rh antigens.

Describe WBCs (leukocytes): they use diapedesis to move in and out of blood vessels they locate areas of tissue damage through chemotaxis they move by ameboid motion they account for less than 1 percent of total blood volume

Define systole and diastole. Systole: ventricle contraction Diastole: ventricle relaxation

What structure divides the left from the right ventricle? interventricular septum

Describe lub-dup. the first sound is longer and louder and is caused by closure of the AV valves; the second sound is shorter and sharper and is caused by closure of the semilunar valves

Cardiac muscle is enclosed by a double sac of serous membrane known as the ___________. pericardium

What is stroke volume? The volume of blood pumped out by each ventricle with each beat of the heart.

What artery is behind the knee? Popliteal

The path of blood flow within the systemic vascular system is: arteries, arterioles, capillary beds, venules, veins

What lifestyle factors contribute to heart disease. Emotional stress Smoking Obesity High-fat/cholesterol diet Lack of exercise HOLES