CARDIO

The right atrioventricular valve

the one-way flow of blood from the right atria to the

right ventricle.

The left atrioventricular valve ensures the one-way flow of blood from the

left atria to the left ventricle.

The aortic valve ensures the one-way flood of blood from the

left ventricle to the aorta.

The pulmonary valve ensures the one-way flow of blood from the

right ventricle to the pulmonary artery.

Describe the direction of the flow of blood in the right side of the heart.

Right atria → right ventricle → pulmonary artery → lungs

Starting at the left atrium

Left atria → left ventricle → aorta → systemic circulation.

. True or False: All 4 valves of the heart can be opened at once.

False.

If all four valves were open, blood would not be able to move to the lungs or rest of body.

Diastole

>relaxation.

>During diastole, or filling of the ventricle

>length of the sarcomere increases.

Systole

>contraction.

> ejection of blood from the ventricle

>length of the sarcomere shortens.

Ventricular diastole:

SL CLOSED

AV OPEN

Ventricular systole:

SL valves OPEN

AV CLOSED

S1

>LUB

>ventricular systole during isovolumetric contraction.

>AV CLOSE

ventricular pressure > atrial pressure.

S2

DUB
SL VALVES close.

>This occurs when ventricular pressure < aortic and pulmonary pressure.

>Beginning of ventricular diastole/ Isovolumetric relaxation

>the T-wave.