respiratory system

Question 1

what are the components of air?

Answer 1

air is made out of 78% nitrogen, 21% oxygen, 0.03% carbon dioxide, and the rest are rare gasses. (CROWN)

Question 2

what is oxygen used for?

Answer 2

oxygen is essential for all living things so that they can carry out life processes

Question 3

what is carbon dioxide used for?

Answer 3

carbon dioxide is given out when living things carry out their life processes

Question 4

what are the main differences between breathing and respiration?

Answer 4

Breathing is taking in and giving out air. Respiration is the reaction of cells when oxygen and nutrients are used to produce carbon dioxide and energy.

Question 5

what does inhaled air contain?

Answer 5

inhaled air contains:
- less carbon dioxide
- more oxygen
- less water vapour
- less heat

Question 6

what does exhaled air contain?

Answer 6

exhaled air contains:
- more carbon dioxide
- less oxygen
- more water vapour
- more heat

Question 7

how do fish exchange gasses?

Answer 7

• take in oxygen through their gills
• water containing dissolved oxygen enters the mouth of the fish. it washes over the gills and enters the blood in the gills
• as water flows out of the gills, carbon dioxide from the blood is carried away.