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Worksheets

Circulatory System

Total questions: 25

Worksheet time: 3hrs 45mins

Name
Class
Date
1.

The structure responsible for pumping blood throughout the body is

a)

the kidney

b)

the stomach

c)

the brain

d)

the heart

2.

These structures located between the 2 atrium and the 2 ventricles that keep blood flowing in ONE DIRECTION are called

a)

stops

b)

veins

c)

valves

d)

gates

3.

Platelets are important for which process?

a)

fighting bacteria

b)

carrying oxygen

c)

recycling water

d)

clotting

4.

Vessels that move deoxygenated (low oxygen) are called

a)

veins

b)

arteries

c)

capillaries

d)

ventricles

5.

Vessels that move deoxygenated (low oxygen) are called

a)

veins

b)

arteries

c)

capillaries

d)

ventricles

6.

What chamber of the heart is identified by the red arrow #1?

a)

left atrium

b)

right atrium

c)

left ventricle

d)

right ventricle

7.

The the chamber of the heart identified with the red arrow #4....?

a)

right atrium

b)

left atrium

c)

right ventricle

d)

left ventricle

8.

The circulatory system is responsible for

a)

delivering nutrients to, and removing wastes from, the cells of the body

b)

the breaking down of food into nutrients usable by the body

c)

the exchange of gases in the body

d)

producing hormones to regulate body functions

9.

Deoxygenated blood from the body enters the heart at

a)

structure 2, the right atrium

b)

structure 3, the right ventricle

c)

structure 8, the left atrium

d)

structure 9, the left ventricle

10.

This structure is responsible for delivering blood to the lungs for oxygenation.

a)

Structure 10, the superior vena cava

b)

Structure 6, the pulmonary artery

c)

Structure 7, the pulmonary veins

d)

Structure 1, the aorta

11.

Oxygenated blood would be found in which chambers of the heart?

a)

2 and 3

b)

2 and 8

c)

8 and 9

d)

3 and 9

12.

Veins carry blood ____________________ to heart while arteries carry blood _____________________________ the heart.

a)

toward, away from

b)

away from, toward

13.

Deoxygenated blood is delivered to the lungs via the __________________________, which is structure ________________.

a)

pulmonary veins, 6

b)

pulmonary artery, 6

c)

pulmonary veins, 7

d)

pulmonary artery, 7

14.

Deoxygenated blood is delivered to the heart via the_________________________, structures _______________.

a)

aorta and pulmonary artery, 1 and 6

b)

sup. & inf. vena cavas, 10 and 11

c)

pulmonary veins, 7

d)

none of the above

15.

Which heart structure prevents oxygenated and deoxygenated blood from mixing?

a)

mitral valve

b)

ventricle

c)

septum

d)

atrium

16.
What does Deoxygenated mean?
a)
Oxygen-rich
b)
Blood flow
c)
Oxygen-poor
d)
Water Flow
17.
The five main parts of the circulatory system are?
a)
heart, blood, nutrients, flakes, skin
b)
heart, blood, valves, crust, mantle
c)
heart, blood, veins, arteries, capillaries 
d)
heart, blood, cells, skin, nerves
18.
The aorta is 
a)
a vein
b)
an artery
c)
a valve
d)
a capillary
19.
The smallest type of blood vessel is the:
a)
nerve
b)
vein
c)
capillary
d)
artery
20.
What is the main organ in the circulatory system?
a)
vein
b)
lung
c)
heart
d)
aorta 
21.
What is the purpose of white blood cells?
a)
carry oxygen
b)
fight pathogens
c)
help the kidneys
d)
identifies blood type
22.
Red blood cells are produced in the...
a)
pancreas
b)
Heart
c)
Muscles
d)
Bone marrow
23.
The bottom chambers of the heart are called
a)
ventricles
b)
atria
c)
vena cava
d)
valves
24.

Oxygen-rich blood from (BLANK) enters (BLANK) atrium and then (BLANK) ventricle.

a)

1. Lungs

2. Left

3. Right

b)

1. Lungs

2. Right

3. Right

c)

1. Heart

2. Left

3. Left

d)

1. Lungs

2. Left

3. Left

25.

What carries blood from the body cells back to the heart

a)

veins

b)

arteries

c)

capillaries

d)

heart