Respiratory system

Question 1

Functions of the respiratory system

Answer 1

Deliver oxygen from the atmosphere to the lungs
Provide method of gaseous exchange within the lungs
Create speech as air passes over the vocal cords
Facilitate sense of smell

Question 2

What are the 3 main sections of the respiratory system?

Answer 2

Air passages
Lungs
Diaphragm

Question 3

Name all the parts of the respiratory system

Answer 3

Mouth & Nose
Pharynx: Where the back of the mouth and nose meet
Larynx: Produces sound when air passes over the larynx
Trachea: Assists with air delivery. Also known as windpipe.
Bronchi: 2 tubes that provide air to the lungs
Bronchioles: Each bronchus subdivides into smaller branches called bronchioles
Alveoli. Cup shaped sacs found at the end of bronchioles, which provide the site for continual exchange of 02 and CO2 called diffusion
Diffused into blood stream

Question 4

What do the lungs contain and what happens in there?

Answer 4

Contains bronchi, bronchioles and the alveoli (alveoli is where gas is exchanged)

Question 5

What is the diaphragm?

Answer 5

Involuntary or smooth muscle that contracts and relaxes to aid breathing at all times
Moves up and down, the size of the chest cavity changes, causing breathing

Question 6

Describe the process of inhalation

Answer 6

1. External intercostal muscles contract and internal intercostal muscles relax, drawing the ribcage upwards (outwards).
2. Diaphragm contracts and flattens.
3. Volume of lungs increases.
4. Air enters lungs moving from high pressure outside to low pressure inside.

Question 7

Describe the process of exhalation

Answer 7

1. Internal intercostal muscles contract and external intercostal muscles relax, bringing the ribcage down.
2. Diaphragm relaxes and becomes dome shaped.
3. Volume of lungs decreases.
4. Air exits lungs moving from high pressure inside to low pressure outside.

Question 8

Define gaseous exchange

Answer 8

The absorption of oxygen from the air in exchange for carbon dioxide removed from the body