Please please help me What gas do we need to live?

Question 1 options:

oxygen

carbon dioxide

water vapour

What tube carries air to the lungs?

Question 2 options:

esophagus

small intestine

trachea

The right lung is smaller than the left lung.

Question 3 options:
True
False
The larynx is also called the

Question 4 options:

throat

voice box

windpipe

Select all of the correct answers:

What three things happen in the nose to the air?

Question 5 options:

Air gets cleaned.

Air gets drier.

Air gets warmed.

Air gets moister.

Question 6 (1 point)
The trachea splits into the two bronchi.

Question 6 options:
True
False
Question 7 (1 point)
Our lungs have a lot of little air sacs.

Question 7 options:
True
False

Question 8 (1 point)
The lungs are very hard.

Question 8 options:
True
False
Question 9 (1 point)
Select all of the correct answers.

Air enters the body by the

Question 9 options:

mouth

nostrils

ears

Question 10 (1 point)
The pharynx is also called the

Question 10 options:

mouth

nose

windpipe

throat

Question 11 (1 point)
Which gas is a waster gas?

Question 11 options:

carbon dioxide

oxygen

water vapour