Circulatory System

Question 1

The circulatory system is developed in the ________.

Answer 1

Embryo

Question 2

____________ is the substance that makes most cells red.

Answer 2

Haemoglobin

Question 3

______________ do not have a nucleus.

Answer 3

Red blood cells

Question 4

________ have a task to fight diseases.

Answer 4

White blood cells

Question 5

___________ produce antiboties.

Answer 5

Lymphocytes

Question 6

______ is the liquid part of the blood.

Answer 6

Plasma

Question 7

_________ carry the blood away from the heart.

Answer 7

Arteries

Question 8

______ are one cell thick.

Answer 8

Capillaries

Question 9

There are about __ liters of blood in the average adult body.

Answer 9

5

Question 10

__________ exchange substances.

Answer 10

Capillaries

Question 11

______ are structures that stop the blood from flowing back.

Answer 11

Valves

Question 12

_____ include valves.

Answer 12

Veins

Question 13

________ have high blood pressure.

Answer 13

Arteries

Question 14

______ is the first sign of a heart disease with several arteries becoming narrower.

Answer 14

Angina

Question 15

Platelets help in _____ the blood.

Answer 15

Clotting

Question 16

Nicotine makes the blood more likely to form _____.

Answer 16

Clots

Question 17

A heart attack is caused by a blood clot in the _____ artery.

Answer 17

Coronary

Question 18

A stroke occurs when there is a blood clot in the blood vessels of the _____.

Answer 18

Brain

Question 19

Capillaries have the _____ blood pressure.

Answer 19

Lowest

Question 20

Veins have ____ blood pressure.

Answer 20

Low

Question 21

_______ is a process in which a substance moves from one place where it is present in large quantities to a place where it is present in small quantities.

Answer 21

Diffusion

Question 22

Transport system contains the heart, _______ and blood.

Answer 22

blood vessels

Question 23

The ____ has two pumps.

Answer 23

heart

Question 24

The blood flows into the heart, atria, then to the ________.

Answer 24

ventricles

Question 25

__________ are continous tubes of different sizes.

Answer 25

Blood vessels

Question 26

The blood leaves the heart through ________.

Answer 26

arteries

Question 27

________ have thick, muscular walls.

Answer 27

Arteries

Question 28

______ have thinner walls.

Answer 28

Veins

Question 29

Red blood cells carry _____ from the lungs to the tissues.

Answer 29

oxygen

Question 30

________ engulf bacteria.

Answer 30

Phagocytes

Question 31

Too much fat in the diet causes _________ to be left in the arteries.

Answer 31

cholesterol