Systems.

Question 1

What is it? Circulatory

Answer 1

A transport system to and from the cells.

Question 2

What does it do?Circulatory

Answer 2

Distributes blood around the body. Allows waste to be taken from cells.

Question 3

What do the blood vessels do? Veins

Answer 3

Veins: large vessels that carry to the heart, thinner than arteries, carry oxygenated blood except from lungs.

Question 4

Arteries:

Answer 4

Arteries: thick walled vessels that carry blood from the heart. All carry oxygenated blood except from artery to blood.

Question 5

Capillaries:

Answer 5

Capillaries: very thin single cell walled to every cell. Allow blood to flow through.

Question 6

Heart

Answer 6

1. deoxygenated blood comes in from the right atrium
2. that blood gets pumped through the lungs by the right ventricle and back into the heart through the left atrium and left ventricle.
   3.oxygenated blood comes out and goes through the body.
   The left side pumps blood around the body and is much stronger.
   Bad cholesterol sticks to the walls and restricts blood flow this will eventually cause a heart attack. Good cholesterol is found in things like fruit&veg and oily fish.
   Heart pumps 8000 liters of blood a day.
   Average adult contains 5L of blood

Question 7

Respiratory What does it do?

Answer 7

Allows gas exchange through the body.
Oxygen molecules pass into the blood and are carried along by red blood cells, blood also carries glucose molecules GLUCOSE + OXYGEN=CARBON DIOXIDE+WATER+ENERGY
CO2 goes into alvioeli puts in oxygen
2 atoms=molecule

Question 8

Breathing IN

Answer 8

Air travels in goes down your windpipe and bronchus into the lungs travels through the air sac wall into blood filled tubes.The blood transports your cells into every part of the body.When you breathe in your diaphragm moves downwards for room for your lungs to inflate. Haemoglobin provides the red pigments in blood

Question 9

Breathing OUT

Answer 9

CO2 and water go from your cells into your blood, then passes through your air sac wall and into your lungs, travel up through your windpipe, trachea, and through your bronchus. Then finally leave though the nose and mouth. Diaphragm moves up to force CO2 out. CO2 = 1 CARBON ATOM 2 OXYGEN ATOMS.

Question 10

Smoking

Answer 10

Irritates the lung lining, causes DNA to mutate, damages the cilia, nose-hairs, it can lead to lung cancer

Question 11

Holding our breaths

Answer 11

When we do this the brain signals the lungs to start again. When our faces hit cold water we can hold our breathe for longer.

Question 12

Digestive system

Answer 12

Where food you eat is broken down. It is important because the chemicals from the food are needed in the other cells of the body.

Question 13

Stomach enzymes

Answer 13

Pepsin and rennin

Question 14

Starch is chemically broken down into glucose molecules

Answer 14

Glucose molecules move into the cells and are used as fuel for respiration.

Question 15

MOUTH

Answer 15

Salivary gland produce saliva, teeth break it down
insizers cutting
K9 tearing
Pre momers- chrushing
momers-grinding.
Tongue pushes down.

Question 16

oesphagus

Answer 16

Tube from mouth to stomach pushes food down

Question 17

Stomach

Answer 17

Large muscular sack containing hydrochloric acid and enzymes.

Question 18

Liver

Answer 18

regenerates, holds 13% of your blood. Largest gland and organ .Absorbs nutrients.

Question 19

Small intestine

Answer 19

breaks down carbohydrates, fat and protein. The wall contains millions of villi

Question 20

large intestine

Answer 20

Home to millions of good bacteria on undigested food. Mucus is added to make faeces.

Question 21

Rectum

Answer 21

Faecus is released into the Anus

Question 22

Anus

Answer 22

Comes from rectum to anus