explanation: circulation and excretion

Our Lady of the Loneliness School, Cantillana (Seville) Year 6

What function do these parts of the circulatory

system have?

The circulatory system consists of…

- BLOOD

- BLOOD VESSELS

- THE HEART

1

- It is a liquid substance in our body that gives

nutrients and oxygen to all the body cells. It also

transport waste products and CO2.

- They are tubes that transport blood throughout

the body.

- It is a special type of muscle and acts as a pump

to send blood around the body.

Match the parts of the circulatory system and

their definitions.

- Plasma. It is a clear fluid which transports nutrients and waste

around the body.

- Red blood cells. These carry oxygen from the lungs to all body

cells.

- White blood cells. These protect the body from germs and

disease.

- Platelets. These are

fragments of old cells.

They help to stop bleeding

from wounds.

Look, read and answer.

1

1. What are the three types of

blood cells?

2. What do they do?

3. Why do you think blood is

red?

Look and think. What blood vessel do nutrients, oxygen and

carbon dioxide (CO2) exchanges take part?

1

Capillaries have very

thin walls. This allows

for nutrients and

oxygen to pass into

the body cells, and for

carbon dioxide (CO2)

and other waste

products to leave the

cells.

Watch these two videos and draw a diagram of a heart and its

movements in your notebook.

1

BLOOD SAVES LIVES

In Spain, a blood transfusion is needed every two minutes! Blood

transfusions are required after traffic accidents, in a lot of

operations and in the treatment of some illnesses.

- Where can you donate blood? - Why is it important to volunteer?

1

EXTRA CREDIT

Research what the

different blood types

are and tell me what is

yours.

Read and discuss.

CIRCULATION

Blood moves constantly in the circulatory system through two

separate circuits: the pulmonary circuit and the systemic circuit.

2 Watch this video about pulmonary and systemic

circulation. Then, contribute to make up a P.E. circuit to

explain circulation.

Taking notes while watching the video is a

good idea.

CIRCULATION AND HEALTH

In order to look after our circulatory system...

-We should eat a healthy diet. Consume vegetable fats, like olive oil,

and foods that are high in iron, like pulses.

-We shouldn’t eat too many carbohydrates and fats.

-We should use salt in moderation.

-We should exercise regularly.

-We shouldn’t smoke.

-We shouldn’t consume

excessive alcohol.

2 Read and, in pairs, design a poster for your town.

Excretion is the elimination of waste products from the blood.

These substances are toxic and need to be eliminated.

3 Read, look and discuss.

3 - What do you think your kidneys do?

- What would happen if your kidneys

did not work well?

- Could you live without kidneys?

- What can you find in your bladder?

Watch this video and draw a diagram

about the functioning of the

excretory system. Then, explain it to

your classmates.

3 Read and match organs and functions.

1. BLADDER

2. URETHRA

3. KIDNEYS

4. URETERS

a. They carry urine from the kidneys to the

bladder.

b. It stores urine until it leaves the body.

c. It is a tube that releases urine out of the body.

d. They filter the blood, retain waste products and

use them to produce urine. They also reabsorb

good nutrients and water and return them to

the blood.

3 Let’s sweat! Stand up, listen and do.

Freeze the

image!

TEACHER

3 Think in groups. What components does your sweat contain?

Write a list.

Sweat consists of:

- Water.

- Mineral salts.

- Waste products.

Sweat glands are long, coiled tubes

that are inside the skin. They are

connected to a pore on the surface

of the skin.

Mini teaching activity.

Look at the picture and explain to

your partner what a sweat gland is and

what it looks like.

3 Read and write TRUE or FALSE. Correct false sentences.

a. Sweat is formed in sweat glands.

b. Sweat has very little water.

c. Sweat cools our body when we are hot.

d. Waste products are not eliminated by sweating.

e. Sweat glands are not considered part of the excretory

system.

3 Copy this introduction and these two columns, listen and

complete the table.

It is very important to look after our excretory system, so we...

SHOULD SHOULDN’T

drink 1.5 litres of water every

day.

consume drugs.

have a shower every day with

warm water and mild soap.

consume junk food.

clean our skin to prevent

infections.

smoke.

drink 6 glasses of water every

day.

drink alcohol.

Freeze the

image!

TEACHER

NUTRITION

II

CIRCULATORY

SYSTEM

BLOOD

-Plasma

-Red blood cells

-White blood cells

-Platelets

EXCRETORY

SYSTEM

transport

oxygen

protection

stop bleeding

BLOOD VESSELS

-Arteries

-Veins

-Capillaries

go to all the body

go to the heart

nutrients and gas exchange

HEART

-Atria

-Ventricles

CIRCULATION

-Pulmonary circulation

-Systemic circulation

exchange of gases

in the lungs exchange of

nutrients, gases and

waste in the cells

EXCRETORY SYSTEM

-Kidneys

-Ureters

-Bladder

-Urethra

blood filtration

transports urine

stores urine

transports urine

SWEAT GLANDS

-They eliminate waste

products.

-They cool your body.

RESPIRATORY SYSTEM

-They expel CO2.