Cardiovascular System

what part of the heart is the strongest?

• right

• left

• upper chambers

when blood first enters the heart it is

• oxygen rich

• oxygen poor

• nutrient rich

the main organ of the cardiovascular system is

• veins

• arteries

• heart

the _______________ of the heart pumps blood throughout the body

• contraction

• sensation

• relaxation

how many chambers are in the human heart?

• 3

• 4

• 5

what type of muscle is only found in the heart?

• cardiac tissue

• pulmonary tissue

• muscular tissue

the adult heart is about the size of

• a baseball

• a clinched fist

• an apple

the two upper chambers of the heart are called

• ventricles

• upper chambers

• atria

what is the thick muscular wall that separates the left and right side of the heart?

• cardiac tissue

• septum

• valves

______________ are flaps of tissue in the cardiovascular system that ensures that blood moves in one direction

• valves

• cardiac tissue

• atrium