Topic 5 : Circulatory Systems

Question 1

What does the circulatory system do

Answer 1

Carries oxygen and nourishment to the tissues and removes waste produce

Question 2

What three parts is the circulatory system composed of

Answer 2

Heart, blood and blood vessels

Question 3

Where is the heart positioned

Answer 3

Behind the ribcage and between the lungs

Question 4

What kind of organ is the heart

Answer 4

Muscular

Question 5

Roughly what size is the heart

Answer 5

The size of a clenched fist

Question 6

What does the heart do

Answer 6

It pumps to keep the transport system moving

Question 7

What type of walls does the heart have

Answer 7

Thick muscular

Question 8

How many pumps is the heart divided into

Answer 8

2

Question 9

How many chambers does each pump of the heart have

Answer 9

2

Question 10

What are the two superior receiving chambers called

Answer 10

Atria

Question 11

What are the two inferior pumping chambers called

Answer 11

Ventricles

Question 12

What is the upper, smaller, thin walled chamber called

Answer 12

Atrium

Question 13

What is the lower, larger, thick walled chamber called

Answer 13

Ventricle

Question 14

What does the upper atrium do

Answer 14

Receives blood coming in from the veins

Question 15

What does the lower ventricle do

Answer 15

Contracts to squeeze blood out into the arteries

Question 16

Where does the deoxygenated blood travel

Answer 16

Along the pulmonary arteries to the lungs where it receives fresh supplies of oxygen and becomes bright red

Question 17

Where does the oxygenated blood flow in the heart

Answer 17

Along the pulmonary veins to the hearts left side pump

Question 18

When the oxygenated blood leaves the left side of the heart what happens

Answer 18

Travels through arteries which gradually divide into capillaries

Question 19

What happens in the capillaries

Answer 19

Food and oxygen are released to the body cells and carbon dioxide and other waste products are returned to the bloodstream which then travels in veins back to the right side of the heart

Question 20

What does blood consist of

Answer 20

55% fluid, plasma and 45% solids, blood cells or corpuscles

Question 21

What is plasma composed of

Answer 21

Water, mineral salts, proteins, nutrients, gases (oxygen, carbon dioxide and nitrogen) in solution, waste products, hormones, and enzymes

Question 22

What three types do blood cells consist of

Answer 22

Red blood cells (erythrocytes), white blood cells (leucocytes) and platelets (thrombocytes)

Question 23

What do red blood cells do and contain

Answer 23

Carry oxygen from the lungs to the tissues and contain a pigment called haemoglobin

Question 24

What is haemoglobin

Answer 24

It helps the oxygen so the oxygen is absorbed by the blood

Question 25

What three things make up white blood cells

Answer 25

Polymorphonuclear leucocytes (75% of total white blood cells), lymphocytes, and monocytes

Question 26

What are white blood cells, what do they do

Answer 26

They are defensive and are concerned with the production of antibodies and the ingestion of cell debris and bacteria

Question 27

What are platelets in the blood

Answer 27

They are concerned with the clotting of blood

Question 28

What are blood vessels divided into

Answer 28

Arteries and veins

Question 29

What do arteries carry

Answer 29

Oxygenated blood from the lungs to the tissues

Question 30

What do veins carry

Answer 30

Deoxygenated blood from the tissues back to the heart before being pumped to the lungs where a gaseous exchange takes place

Question 31

What types of vessels are both arteries and veins

Answer 31

Three-walled

Question 32

What type of walls are arteries made of

Answer 32

Thicker walls which are capable of contraction and expansion

Question 33

How do veins help to regulate the direction of blood flow to the heart

Answer 33

They are supplied with valves

Question 34

What does the term tissue perfusion mean

Answer 34

The flow of blood into the tissues

Question 35

What does severe inadequate tissue perfusion lead to

Answer 35

A clinical syndrome known as shock