Respiratory System

Question 1

Functions of respiratory system

Answer 1

1. To transfer oxygen to the lungs
2. To transfer O2 through the process of diffusion, from the lungs to the blood
3. Th transfer CO2 and other gases from the blood into the lungs, where gases are breathed out.

Question 2

Function of mouth, nose and nasal cavity

Answer 2

Warms, filters and moistens incoming air

Question 3

Function of trachea

Answer 3

Carries air from the throat into the lungs. It’s lined with a mucous membrane and tiny hairs called cilia

Question 4

Function of bronchi

Answer 4

Branch off into left and right lungs

Question 5

Function of bronchioles

Answer 5

Are smaller than bronchi and lead to alveolar sacs

Question 6

Function of alveoli

Answer 6

Individual, hollow cavities contained within the alveolar sacs where gases are exchanged

Question 7

Function of diaphragm

Answer 7

A broad band of muscle underneath the lungs, attached to the lower ribs and sternum