Text Chapter 22: Heart and Circulatory System Flashcards Preview

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Flashcards in Text Chapter 22: Heart and Circulatory System Deck (29):
1

Atria

2 chambers

2

Ventricles

2 chambers

3

Valves

2 atrioventricular, 2 semilunar

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Connecting Blood Vessles

arteries and veins, arterioles and venules, capillaries

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Tissue Layers of the Heart

endocardium, myocardium, paricardium

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Endocardium

lining

7

Myocardium

muscle

8

Paricardium

outside

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Types of Blood Vessels Found in the Body

arteries, veins, arterioles, venules, capillaries

10

Path of Blood Flow Through the Heart and Lungs and Body

left ventricle, semilunar valves, aorta, descending aorta, inferior vena cava, superior vena cava, right atrium, atrioventricular valve, right ventricle, semilunar valves, pulmonary artery (to right lung), pulmonary artery (to left lung), pulmonary veins (from right lung), pulmonary veins (from left lung), left atrium, atrioventricular valve

11

Describe the Heartbeat

“lubb”- atrioventricular valves close, atria relax, ventricles contract, “dubb”- semilunar valves close

12

Relate the Heartbeat to Heart Sounds and the ECG Pattern

P- atria contract (“lubb”), QRS- atria relax, ventricles contract, T- ventricles Relax (“dubb”)

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Components that Regulate Heartbeat

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Blood Pressure

systolic pressure/ diastolic pressure

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Systolic Pressure

pressure during ventricular contraction

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Diastolic Pressure

pressure during ventricular relaxation

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Functions of Blood

supplies nutrients, removes waste, equalizes temperature, transports hormones and antibodies

18

Red Blood Cells

carry oxygen

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White Blood Cells

defend against invaders

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Platelets

initiate blood clotting

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Plasma

fluid portion of the blood

22

LDL

low density lipoprotein, delivers cholesterol, “bad” cholesterol, leads to hypertension, atherosclerosis, stroke, heart attack

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HDL

high density lipoprotein, returns cholesterol to liver for destruction, “good” cholesterol, removes LDL

24

Major Diseases of the Circulatory System

hypertension, atherosclerosis, stroke, heart attack

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Common Risk Factors for Cardiovascular Disease

high blood pressure, high bad cholesterol, overnutrition, excess weight, diabetes, underexercise, smoking, heredity, tension/stress

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Arteries

carry blood away from the heart

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Veins

carry blood towards the heart

28

Right Ventricle

pumps blood only to the lungs

29

Left Ventricle

pumps blood to the rest of the body (not the lungs)