functions of respiratory organs

Question 1

Nose and Nasal Cavity

Answer 1

Air passes through the nose into the respiratory system. Tiny hairs and mucus trap dust

Question 2

Throat (Pharynx) and epiglottis

Answer 2

Pharynx connects the oral and nasal cavities to the Trachea

Epiglottis prevents food from entering the trachea

Question 3

Trachea with cartilage rings

Answer 3

Air flows down the trachea from the nose into the lungs
Trachea is reinforced with rings of cartilage
Lined with hairs to move dust and other particles out of the airways

Question 4

Bronchi

Answer 4

Bronchi connect trachea to the lungs. Bronchi produce mucus also traps dust particles

Question 5

Bronchioles

Answer 5

Air flows through bronchioles to each alveolus

Question 6

Alveoli

Answer 6

Tiny air-filled sacs that are surrounded by small blood vessels called capillaries
Walls are very thin so gases can cross between capillaries and the sacs

Question 7

Diaphragm

Answer 7

The diaphragm contracts to expand the space inside the thoracic cavity. Whilst this is happening, the muscles between the ribs also contract, which moves the rib cage up and out