P4 Human System

Mr Lim, who is 68 years old, needs to put on his dentures (false teeth) before he eats.

Why does Mr Lim need to put on his dentures before he starts eating?

• They help to digest the food.

• They help to release digestive juices into his mouth.

• They help to break down the food into smaller pieces.

• They help to make food soft and wet so that it can be swallowed easily.

Study the human digestive system as shown in the picture.

Which of the following correctly identifies organ E and its function?

• Large intestine - Removes water

• Large intestine - Digests food completely

• Small intestine - Absorbs digested food into the blood

• Small intestine - Breaks down food into simpler substances

The diagrams below show the different organ systems, Q, R, S and T.

Which of the diagrams show the circulatory system and respiratory system?

• Q and R

• R and S

• S and T

• Q and T

The picture shows a lampshade on a stand. The lamp shade has thin metal rods to support it and give the lampshade its shape. Which one of the following systems in our body provides similar function as the metal rods used in the lampshade?

• Skeletal system

• Muscular system

• Digestive system

• Respiratory system

Study the picture. Which of the following correctly identifies organ X and its function?

• small intestine - It gets rid of excess water.

• small intestine - It absorbs digested food into the bloodstream.

• large intestine - It stores undigested food.

• large intestine - It digests the food completely.

The following is a flow chart of the parts of the human digestive system. Which letter, A, B, C or D, represents the small intestine?

• A

• B

• C

• D

Identify the part (1), (2), (3) or (4) in which there is no digestion.

• 1

• 2

• 3

• 4

Which of the following statements are true of the digestive system?

A : The windpipe is part of the digestive system.

B : Digested food is absorbed in the small intestine.

C : It helps to break down food into simpler substances.

D : Digestion starts at the mouth and ends at the stomach.

(Select all the correct answers)

• A

• B

• C

• D