Biology Breathing and Respiration

Question 1

3 main gases that are taken in and removed from body

Answer 1

oxygen, hydrogen and carbon dioxide

Question 2

what is gas exchange

Answer 2

swapping of gases
absorb oxygen into blood and removing carbon dioxide

Question 3

diffusion meaning

Answer 3

movement of particles or gas moving from a higher to lower concentration

Question 4

what does diffusion do to oxygen and alveoli

Answer 4

diffusion moves oxygen out of the alevoli and into the blood

Question 5

what is respiration

Answer 5

chemical process which occurs in all of your cells

Question 6

whats gas exchange

Answer 6

process involving swapping of gases that occurs at exchange surfaces

Question 7

gas exchange function

Answer 7

allows oxygen to travel into your cells for respiration whilst removing carbon dioxide as it is a waste substance

Question 8

what is alveoli

Answer 8

tiny air sacs in the lungs where gas is exchanged during breathing

Question 9

how are alveoli adapted for gas exchange

Answer 9

large surface area - more diffusion of oxygen into blood from alveoli and more carbon dioxide out of the blood into the alveoli
ONE CELL THICK - diffusion distance is smaller
LOTS OF BLOOD CAPILLARIES - good blood supply