Respiratory System

Question 1

Oxygen debt

Answer 1

The amount of oxygen needed at the end of a physical
activity to break down any lactic acid is known as oxygen
debt

Question 2

Gasses exchange

Answer 2

The alveoli are surrounded by capillaries
(very narrow tubes) that carry blood.

While oxygen is taken in carbon dioxide
is given out, or exchanged, into the
alveoli and is then breathed out.

Question 3

What does the alveoli do to air

Answer 3

1. Filtered by hairs and mucus
2. It is warmed by blood vessels in your nose
3. Moistened by vapour