blood and alveolus

Question 1

Plasma

Answer 1

liquid/ fluid component of the blood – water based ~55%

Question 2

Erythrocytes

Answer 2

red blood cells – transport O2 ~45%

Question 3

Leukocytes

Answer 3

(white blood cells)
Phagocytes (nonspecific
immunity)
Lymphocytes (specific immunity)

Question 4

Platelets

Answer 4

involved in blood clotting

Note: Leukocytes and platelets make up less than 1% of the blood

Question 5

Alveoli - T

Answer 5

Thin walls – surrounded by a single layer of
epithelial cells (minimizes diffusion distance)
- capillary walls only one cell thick too

Question 6

Alveoli - R

Answer 6

Rich capillary network surrounding each alveolus
– maintains high concentration gradient
(O2/ CO2) between lungs and blood for diffusion

Question 7

Alveoli - I

Answer 7

Increased SA:V ratio – small, spherical shape
increases surface area while decreasing
volume

Question 8

Alveoli - M

Answer 8

Moist – cells lining each alveolus secrete fluids
to allow gases to dissolve (dissolved oxygen
diffuses easier into blood) and prevent alveoli
from collapsing on themselves/ sticking together