BIOS 1715 Lab 4 Heart and Circulation

Function of the right ventricle?

Pumps deoxygenated blood to the lungs

Function of the left ventricle?

Pumps oxygenated blood to the body

Function of the right atrium?

Receives deoxygenated blood from vena cavae

Function of the left atrium?

Receives oxygenated blood from lungs

What does the aorta do?

Carries oxygenated blood to systemic circulation

What do pulmonary arteries do?

Carry blood from heart to lungs (deoxygenated)

What do pulmonary veins do?

Carry oxygenated blood from lungs to heart

What do the vena cavae do?

Return deoxygenated blood from the body to the heart

Function of the tricuspid valve?

Prevents backflow into right atrium

Function of the pulmonary valve?

Prevents backflow into right ventricle

Function of the mitral (bicuspid) valve?

Prevents backflow into left atrium

Function of the aortic valve?

Prevents backflow into left ventricle

What makes the “lub” heart sound?

Closing of mitral and tricuspid valves

What makes the “dup” heart sound?

Closing of aortic and pulmonary valves

What are chordae tendineae?

Tendons anchoring AV valves to prevent inversion

What is the epicardium?

Outer layer of the heart wall

What is the myocardium?

Muscular layer that pumps blood

What is the endocardium?

Inner lining of heart wall

What is the pericardium?

Sac surrounding the heart

Which side of the heart pumps deoxygenated blood to lungs?

Right side

Which side pumps oxygenated blood to body tissues?

Left side

What is systolic pressure?

Pressure when heart contracts

What is diastolic pressure?

Pressure when heart relaxes