Living Things and Non-living Things - Grade 4 Science

Examples of Vertebrates

1. Goat
2. Human
3. Hen
4. Fish
5. Frog
6. Sheep

Examples of Invertebrates

1. Spider
2. Butterfly
3. Fly

Human Digestive System Diagram

Functions of parts of digestive system

(i) Functions of the Mouth

1. Food is chewed using teeth.
2. Food mixes with saliva.

(ii) Functions of the Oesophagus

1. This is the passage of food from the mouth to the stomach.
2. It is also called gullet or food pipe.

(iii) Functions of the Stomach

1. This is a food storage.
2. Food mixes with digestive juice.

(iv) Functions of Small Intestine

1. This is a place where food mixes with digestive juice.
2. Digested food is absorbed into the body in the small intestine.

(v) Functions of Large Intestine

1. Water and mineral salts are absorbed in the large intestine.
2. There is no digestion in the large intestine.

(vi) Functions of the Rectum

1. This is where undigested food is stored.

(vii) Functions of the Anus

1. This is the passage of undigested food from the body.