Cardiovascular System Day 4

​The Cardiac Cycle

review questions

Multiple Choice

The upper 2 chambers of the heart are called

• Right/Left Atrium

• Right/Left Ventricle

• Right/Left Bicuspid

• Right/Left Tricuspid

Multiple Choice

The valve that separates the right atrium and the right ventricle is the

• bicuspid valve

• tricuspid valve

• aortic semilunar valve

• pulmonary semilunar valve

Multiple Choice

The lower 2 chambers of the heart are called

• Right/Left Atrium

• Right/Left Ventricle

• Right/Left Bicuspid

• Right/Left Tricuspid

Multiple Choice

This valve opens to allow blood to flow to the lungs

• bicuspid valve

• tricuspid valve

• aortic semilunar valve

• pulmonary semilunar valve

Multiple Choice

This valve opens to allow blood to flow to the body

• bicuspid valve

• tricuspid valve

• aortic semilunar valve

• pulmonary semilunar valve

Multiple Choice

Arteries carry blood

• away from the heart

• toward the heart

• to the liver

• to the stomach

Multiple Choice

A vein has ______. This helps keep blood going in the right direction.

• valves

• very thin walls

• very thick wall

Match

Match the following

• Veins

• artery

• venule

• arteriole

• capillary

goes toward heart, carries deoxygenated blood

goes away from the heart, carries oxygenated blood

small vein

small artery

gas exchange occurs

• goes toward heart, carries deoxygenated blood

• goes away from the heart, carries oxygenated blood

• small vein

• small artery

• gas exchange occurs

Cardiac Cycle

Cardiac Cycle Video
● Atria relaxes

● Blood enters from superior & inferior vena cava on

right side and blood enters from pulmonary veins
on left side

● Atria contracts (AV Valves open) (Ventricles relax)

● Blood pushed into ventricle

● Ventricles contract (SL Valves open) (atrias relax)

● pushes blood into pulmonary artery on right side

and pushes blood into aorta on the left side

● Systole= contraction
● Diastole= relaxation

Multiple Choice

Systolic means_______

• relaxation

• contraction

• filling

Conductive Pathway

● Cardiac muscle contracts spontaneously & continuously

• heart activity is regulated by the autonomic nervous system and the nodal system

Sinoatrial (SA) Node – group of
nerve cells in the right
atrium. “Natural Pacemaker”
of the heart. (60-100 bpm)

Internodal Tract/Bachmann’s
Bundle

group of nerve fibers between
the atria and ventricles (40-60 bpm)

Atrioventricular (AV) Node –

Conductive Pathway

Bundle of His – group of nerve

fibers in the septum.

Right Bundle Branch and

Left Bundle Branch – nerve
fibers that carry the impulse

down the ventricles.
Purkinje Fibers – a network

of nerve fibers located
throughout the ventricles
(20-40 bpm)

Match

Match the following

• Sinoatrial node

• Atrioventricular node

• Bundle of His

• Bundle branches

• Purkinje Fibers

located in right atrium; natural pacemaker

located between the right atrium & right ventricle

group of nerve fibers in the septum.

 nerve fibers that carry the impulse

     down the ventricles.

nerve fibers located    throughout the ventricles

• located in right atrium; natural pacemaker

• located between the right atrium & right ventricle

• group of nerve fibers in the septum.

•  nerve fibers that carry the impulse

       down the ventricles.

• nerve fibers located    throughout the ventricles