Gas Exchange KS3 Y7

Which means to take into the lungs to gain oxygen?

• Inhale

• Exhale

• Respire

• Diffuse

A tiny air sac inside a lung, adapted to diffuse oxygen easily.

• Bronchiole

• Trachea

• Alveolus

• Nasal Passage

Many systems of organs work together to make up...

• An organ

• An organism

• A cell

• A tissue

Besides the mouth, how else can air enter the body from outside?

• Diffusion

• Skin

• Nasal Passage

• Stomach

The gas which we need to survive is called...

• carbon dioxide

• argon

• oxygen

• nitrogen

The gas which air is mostly made of is called...

• carbon dioxide

• argon

• oxygen

• nitrogen

The gas which the body exhales as waste is called...

• carbon dioxide

• argon

• oxygen

• nitrogen

Which of these is a way in which alveoli are adapted to work well?

• They are very large

• They have thick walls

• They have thin walls

• There are only a few of them

A lung is considered...

• An organ system

• An organ

• An organism

• A cell

Which is the smallest?

• Trachea

• Bronchus

• Bronchiole

• Lung