Respiratory system

Question 1

Function of respiratory system

Answer 1

Enable us to take in and expel air from the lungs
Oxygen into blood
Removes carbon dioxide from blood
Allows heat to leave the body
Creates speech and sense of smell

Question 2

Nasal cavity

Answer 2

Nose and area just behind the nose
Air is warmed and moistened as it passes
Mucus and fine hairs capture dust and microbes (filters air)

Question 3

Pharynx

Answer 3

Part of the throat at the back of the mouth
Divides into esophagus and larynx

Question 4

Larynx (voice box)

Answer 4

Contain vocal cords and creates speech

Question 5

Trachea (windpipe)

Answer 5

Made of smooth muscle which expands and contracts when breathing
Supported by rings of cartilage

Question 6

Bronchi

Answer 6

Smooth muscle supported by cartilage
Branch off into bronchioles

Question 7

Bronchioles

Answer 7

Subdivide into bronchi

Question 8

Alveoli

Answer 8

Small air sacs which are covered by capillaries
Oxygen gets into the blood and carbon dioxide leaves the blood

Question 9

Diaphragm

Answer 9

Involuntary smooth muscle at the bottom of the chest cavity
Contracts and relaxes

Question 10

Pleura

Answer 10

Lines chest cavity, diaphragm and lungs
Parietal, visceral and pleural

Question 11

Pleural cavity

Answer 11

Space in between both pleura
Filled with fluid that reduces friction between lungs and chest cavity