Blood and the circulatory system

Question 0

What are the four components of blood

Answer 0

Blood is made up of four parts or components: plasma, red blood cells, white blood cells and platelets

Question 1

What does blood bring around the body

Answer 1

blood carries food, oxygen and waste products to and from all the cells in our body.

Question 2

What is plasma

Answer 2

Plasma is the liquid part of blood. It is a pale yellow colour and is mostly made of water.

Question 3

What is the purpose of plasma

Answer 3

it transports chemicals and heat around the body.

Question 4

Where are red blood cells made

Answer 4

Red blood cells are made in the bone marrow.

Question 5

What do we need to make haemoglobin.

Answer 5

Iron

Question 6

What does haemoglobin do

Answer 6

haemoglobin carries oxygen. This allows red blood cells to release oxygen around the body

Question 7

Are white blood cells made

Answer 7

White blood cells are also made in bone marrow.

Question 8

What do white blood cells do

Answer 8

White blood cells fight infection

Question 9

Where are platelets formed

Answer 9

Platelets are formed in the bone marrow

Question 10

What do platelets do

Answer 10

Platelets help to form blood clots. In this way they help to prevent loss of blood

Question 11

Name the different type of blood vessels

Answer 11

There are three main types of blood vessels: arteries, veins and capillaries.

Question 12

What are arteries and what do they do

Answer 12

Arteries carry blood away from the heart, this means they are under a lot more pressure. They have large walls and muscle. There is no need for valves in arteries

Question 13

What are veins and what do they do

Answer 13

Veins carry blood to the heart. The blood flow or pressure in a vein is low. The low pressure means that veins can have thinner, weaker walls than arteries. To prevent blood flowing backwards in veins they have valves at regular intervals.

Question 14

What is the function of capillaries

Answer 14

Capillaries allow materials to pass in and out of the bloodstream.

Question 15

Describe the heart and where is it in our body

Answer 15

The heart is about the size of a clenched fist. It is located in the left-hand side of the chest.The heart is made of a type of muscle called cardiac muscle. This is very strong and does not tire easily.
The heart pumps blood around our body in blood vessels.When we exercise, the heart beats faster

Question 16

What is the septum

Answer 16

The two sides of the heart are separated by a muscular wall called the septum.

Question 17

What do valves do

Answer 17

Valves in the heart make sure that blood can only flow in one direction.

Question 18

Where are the atriums and the ventricles

Answer 18

Atriums are the two chambers at the top of the heart and the ventricles are the two at the bottom

Question 19

Where does the blood with little oxygen go when travelling through the heart

Answer 19

Enters through the vena cava. The right atrium then the right ventricle up to the pulmonary artery

Question 20

Where does the blood with lots of oxygen go through the heart

Answer 20

Enters through the pulmonary vein into the left atrium, the left ventricle and out the aorta

Question 21

On average how much does an adult heart beat per minute

Answer 21

On average the adult heart beats 70 times a minute

Question 22

What is a pulse

Answer 22

As the blood is pumped down the arteries it causes a wave of pressure. This wave of pressure is called a pulse.

Question 23

What effect does exercise have on the heart and body

Answer 23

Exercise causes us to breathe faster.
Exercise causes the heart to contract more strongly.
Exercise increases the strength of the muscles in our arms and legs and it also increases the strength of our heart.
Exercise helps to reduce weight.

Question 24

Why does heart disease mainly occur

Answer 24

arteries that supply blood to the heart becoming clogged with fat.

Question 25

Why is blood considered to be a tissue

Answer 25

It contains cells