revision on concept 1.1

Fish breathe oxygen gas dissolving in water by………………….

• lungs

• gills

• stomach

……………………… has a role in respiration.

• diaphragm

• stomach

• small intestine

…………………………. passes the food from pharynx to stomach.

• Esophagus

• stomach

• trachea

• alveoli

digestion begins in the stomach with the help of saliva

• true

• false

System that breaks down food into a simpler form is………………… system

• respiratory

• digestive

• nervous

( nose - trachea - stomach - lungs ) cross the odd word.

• nose

• trachea

• stomach

• lungs

Fish breathe………….. gas which dissolves in water.

• oxygen

• carbon dioxide

The digestion of food starts in the……………………..

• mouth

• stomach

• small intestine

• large intestine

We eat food to obtain energy.

• true

• false

 

Pollution of water causes great problems for amphibians.

• true

• false