Gas Exchange in Humans

Question 1

What is the structure of the gas exchange in lungs?

Answer 1

trachae (top tree looking part)

bronchus (starting part of a branch)

bronchioles (mini parts of branches)

alveoli ( leaf looking parts)

lung (big eye looking thing)

ribs ( look like ribs)

in between ribs ( intercochol muslces)

diaphragm (sad smile)

Question 2

What are the adapations for efficient gas exchange?

in the alveoli

Answer 2

surface area, concentration gradient and diffusion distance

Question 3

What is surface area in human gas exchange?

Answer 3

bronchioles end at air sacs called alveoli

lots of them and they have folded membranes

high surface area

many capillaries

faster rate of difussion

Question 4

What is concentration gradient in human gas exchange?

Answer 4

ventilation - brings in air with high conc^ of oxygen replaces air with low conc^ of oxygen

circulation - replaces blood high in oxygen with blood low in oxygen

maintains a high concentration gradient

so faster rate of diffusion

Question 5

What is diffusion distance in human gas exchange?

Answer 5

alveoli and capillary have thin epitheliums

short diffusion pathway

faster rate of diffusion