respiratory system

Question 1

Funtion

Answer 1

• to take in oxygen and remove carbon dioxide and waste

Question 2

Pathway of oxygen

Answer 2

1. Inhale oxygen through the nasal cavities or mouth
2. Goes down the oesophogus to bronchi to bronchioles in the lungs to alveoli.
3. Exchange of oxygen and carbon dioxide occurs in capillaries in alveoli.
4. Exhale carbon dioxide and waste

Question 3

Inhale

Answer 3

• chest cavity expands
• intercostal muscles contract
• lungs expand
• diaphram contracts

Question 4

Exhilation

Answer 4

• chest cavity contracts
• intercostal muscles relax (expand)
• lungs contract
• diaphram relaxes (expands)