anatomy ch 10-11 journal. what is the composition of blood? plasma 55% (mostly water) formed...

Anatomy Ch 10-11 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