Gas Exchange - Humans

Question 1

Gas Exchange

Answer 1

diffusion of oxygen from the alveolar to the blood and diffusion of carbon dioxide from the blood to the alveolar.

Question 2

Trachea

Answer 2

also known as wind pipe

Question 3

Bronchi

Answer 3

Singular = bronchus

Question 4

Pleural Cavity

Answer 4

the space between the two pleural membranes. It is filled with pleural fluid.

Question 5

Diaphragm

Answer 5

when we inhale the diaphragm contracts and pulls down wards when we exhale the diaphragm relaxes and goes back up.

Question 6

Pleural membranes

Answer 6

separates lungs from the ribs so that they don’t get damaged.

Question 7

Rib Cage

Answer 7

Protects lungs and holds them in place. When inhaling it moves out and up, when exhaling it moves down and in.

Question 8

Bronchi-oles

Answer 8

the air passages in the lungs

Question 9

Cartilage rings

Answer 9

they are supports for the airway so that it can be kept open when we breathe.

Question 10

Internal Intercostal Muscles

Answer 10

when inhaling they relax but when we exhale they contract and pull the ribcage in

Question 11

External intercostal muscles

Answer 11

when inhaling they contract and pull the ribs out wards but while exhaling they relax.

Question 12

Inhale

Answer 12

Volume of lungs increase so that the air pressure inside lungs decreases

Question 13

Exhale

Answer 13

Volume of lungs decreases so that the air pressure inside increases

Question 14

Alveoli (6)

Answer 14

1. One cell thick wall
2. also capillary wall is thin
3. large SA
4. Alveoli wall is moist
5. Concentrations