Year 9 Small intestine

What does the small intestine do?

• Absorbs water into the blood stream.

• Has a big surface area.

• Allows small soluble molecules to enter the blood stream.

• Allows large molecules to be absorbed into the blood stream.

Small food molecules enter the small intestine from the?

The inner wall of the small intestine is covered in finger structures called?

• Phili

• Villi

• Silli

• Chilli

How many cells thick is the wall of the small intestine?

• 5

• 10

• 1

• 100

What's the name of the type of blood vessel that takes blood from the heart?

• Vein

• Artery

• Capillary

Protease is an enzyme which breaks down...

• Carbohydrate

• Vitamin C

• Amino acids

• Protein

To pass through the small intestine into the bloodsteam food molecules need to be small and ...

Adaptions of the long intestine to effectively absorb food molecules include.

• One cell thin wall

• Rich blood supply

• Being very long

• Villi increasing the surface area

Which enzyme breaks down fat?