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WorksheetsCirculatory System
Total questions: 30
Worksheet time: 58mins
What does your heart do?
pumps blood through your body
protects your body
helps your exercize
Your heart is about the size of your __________.
mouth
fist
show
What does circulate mean?
pump blood
beat quickly
go around and around
Your heart is a _____________.
tube
muscle
vein
Which describes all the parts of the circulatory system?
heart, lungs, stomach, muscles
heart, blood, arteries, and veins
bones, skin, hair
These cells, in the blood, carry oxygen and give the blood its color.
white blood cells
plasma
platelets
red blood cells
Oxygenated blood returning from the lungs enters the left
atrium through:
The pulmonary arteries.
The pulmonary veins.
The coronary sinus.
All of the above.
Regardless of the heart chamber, contraction is called ____________ and relaxation, ____________.
Diastole, systole.
Systole, diastole.
Fibrillation, defibrillation.
Defibrillation, fibrillation.
Valves in veins serve to:
Release excessive pressure to protect these thin-walled vessels.
Counteract the crushing force of surrounding skeletal muscles.
Prevent backflow of blood in the absence of high blood pressure.
Adjust blood pressure by compartmentalizing the venae cavae.
