OD4.U12.VC

Choose the correct answer:

The gas formed when carbon is burned, or when people or animals breathe out

• blood

• carbon dioxide

• vein

• system

Fill in the blank:

System is a _____ of things or parts that work together.

(heart/ lungs/ group)

Choose the correct answer:

• heart

• veins

• lungs

• mouth

Choose the correct answer:

• stomach

• skin

• diaphragm

• trachea

Answer explanation

Write the correct word describes this picture:

(teeth/ capillary/ heart/ diaphragm)

Choose the correct answer:

Capillaries are smaller than ________ and _____.

• carbon dioxide and veins

• arteries and pulse

• arteries and blood

• arteries and veins

Write the correct word:

The _____ is in the chest, a little to the left of the center.

Write the correct word with the definition:

The tube in your throat that carries air to the lungs

(lungs/ trachea/ veins/ artery)

Write the correct word:

The muscle between your lungs and your stomach that helps you to breath.

The beating of your heart is _____.

• heart

• pulse

• system

• diaphragm