Body Systems

Question 1

What is Digestion?

Answer 1

Breaking down food so that it is small and soluble enough to pass through the wall of the small intestine

Question 2

What is Absorption?

Answer 2

transporting digested food molecules from the lumen of the gut into the blood

Question 3

Name the parts of the body from smallest to biggest

Answer 3

Chemicals, Cells, Tissue, Organs, Organ Systems, Organisms

Question 4

Describe the process of digestion

Answer 4

The mouth creates a bolus which is chewed mushed food.
The teeth chew the food and the tongue pushes it.
Food is squeezed in the oesophagus into the stomach
The stomach contains acid. The acid and special chemicals called enzymes break down the good even more.
In the small intestine, the broken down food gets into the blood so the body can use it. It is 6 - 8 metres long.

Question 5

What is the stomach made off and what is its purpose?

Answer 5

The stomach is made of muscular tissue (to churn the food aka mechanical breakdown), nervous tissue (to co-ordinate the muscular contractuons) and glandular tissue (to produce and secretes enzymes, hydrochloric acid and mucus) and epithelial tissue (to cover the outside and inside of the stomach)

Question 6

What is Peristalsis?

Answer 6

Squeezing food in the oesaphagus

Question 7

What are the 4 uses of glucose?

Answer 7

to be converted to starch, for respiration, to make new chemicals, for storage

Question 8

What does glucose produce?

Answer 8

Protein, cellulose, sugar and fat

Question 9

Describe some qualities of starch

Answer 9

Starch is a large molecule called a polymer
It is a store of extra glucose the plant has mad
It is insoluble
Plants store starch in their roots
Roots can’t produce their own starcch because they don’t do photosynthesis

Question 10

Where do the bones meet?

Answer 10

At the joints

Question 11

What are the joints at the shoulder and hip called?

Answer 11

Ball and Socket joints - they allow movement in different directions

Question 12

What type of joint is the elbow joint?

Answer 12

A hinge joint - it allows movement up and down, but not side to side

Question 13

What type of joints are in the spine

Answer 13

Fused joints that only have a small amount of movement

Question 14

What type of joint is the skull?

Answer 14

Immovable joint - made up of joints that have fused together so they cannot move

Question 15

What is respiration?

Answer 15

A chemical process in which energy is released from food substances, such as glucose - a sugar

Question 16

What is found in the mitochondria?

Answer 16

Oxygen and Sugar

Question 17

Describe Gas Exchange

Answer 17

When breathing, oxygen moves into your lungs through air, making your lungs an area of high concentration. This means that diffusion will take place, transporting oxygen into the blood capillaries.
Then, the oxygen turns into CO2) by the process of respiration in the blood capillaries. The blood capillaries are now an area of high concentration for CO2, meaning that through diffusion CO2 will go into the lungs. From there, it is breathed out.