Absorption of materials

Question 1

what just happen for respiration to occur

Answer 1

oxygen and nutrients from food must be absorbed into the bloodstream to be delivered to cells for respiration
waste materials such as carbon dioxide must also be removed from cells into the blood stream

Question 2

what do capillary networks allow for

Answer 2

the exchange of materials at a cellular level

Question 3

why do surfacecs in the absorption of materials have certain features in common

Answer 3

to increase the efficiency of absorption

Question 4

what features increase the efficiency of absorption

Answer 4

large surface area
thin walls
extensive blood supply

Question 5

what is the function of lungs

Answer 5

they are the organs of gad exchange

Question 6

name the features of the lung

Answer 6

trachea
bronchi
bronchioles
alveoli
diaphragm

Question 7

why is there a large number of alveoli in the lungs

Answer 7

to provide a large surface area

Question 8

how are oxygen and carbon dioxide absorbed

Answer 8

through the thin alveolar walls to or from the many blood capillaries

Question 9

where are the nutrients from foods absorbed into

Answer 9

the villi of the small intestine
the large number of thin walled villi provided a large surface area

Question 10

what does a villus contain

Answer 10

a network of capillaries to absorb glucose and amino acids
a lacteal to absorb fatty acids and glycerol