Respiratory system

Question 1

Functions of respritory system

Answer 1

1. Deliver oxygen from the atmosphere to the lungs
2. Provide method of gaseous exchange within the lungs- Oxygen enters the blood, carbon dioxide exits
3. Create speech as air passes over the vocal cords
4. Facilitate sense of smell

Question 2

Inspiration

Answer 2

intercostals contract, diaphragm contracts, lung volume increases, air pressure in lungs decreased

Question 3

Expiration

Answer 3

intercostals relax, diaphragm relaxes, lung volume decreases, air pressure in lungs increase

Question 4

The diaphragm

Answer 4

Involuntary or smooth muscle that contracts and relaxes to aid breathing at all times