respiration

Question 1

trachea

Answer 1

tube that connects the nose and mouth to the lungs

Question 2

bronchi

Answer 2

the trachea divides into two larger tubes called the bronchi (plural)/bronchus (singular)

Question 3

bronchiole

Answer 3

a large network of tubes that bronchi divide into - like the branches of a tree

Question 4

alveoli

Answer 4

many tiny air sacs where gas exchange takes place

Question 5

ribs

Answer 5

a skeletal structure made from bone which protects the vital organs

Question 6

intercostal muscles

Answer 6

small muscles between the ribs that allow the rib cage to move up and down

Question 7

diaphragm

Answer 7

a sheet of muscle which contract which give the lungs space to expand and take air in

Question 8

what is an adaptation benefit of alveoli having a large blood suply

Answer 8

Means that there is a constant diffusion gradient that lets oxygen get absorbed in to the blood

Question 9

what is an adaptation benefit of alveoli having a large surface

Answer 9

A larger surface area means that diffusion of gases happens faster

Question 10

what is an adaptation benefit of alveoli being one cell thick

Answer 10

A shorter distance for the gases to diffuse means that diffusion happens faster

Question 11

what is an adaptation benefit of moist surface of alveoli

Answer 11

Allows gases to dissolve before diffusion

Question 12

difusion

Answer 12

Diffusion is the movement of a substance from an area of high concentration to an area of low concentration. Diffusion happens in liquids and gases because their particles move randomly from place to place. Diffusion is an important process for living things; it is how substances move in and out of cells.