respiration

Question 1

trachea

Answer 1

air passage to the lungs

Question 2

alveoli

Answer 2

tiny sacks in the lungs to allow oxygen and carbon dioxide to be exchanged

Question 3

bronchiole

Answer 3

runs through the lungs and has alveoli attached to the ends. this ensures that incoming air goes to all the alveoli

Question 4

ribs

Answer 4

protects the heart and the lungs

Question 5

intercostal muscles

Answer 5

connects the ribs together and allows the chest cavity to expand

Question 6

diaphragm

Answer 6

muscle that separates the chest and stomach and it controls inhalation and exhalation

Question 7

how do we get air into our lungs

Answer 7

1. contract rib cage upward & outward
2. lungs expand, air sucked in through nose & mouth
3. diaphragm down, oxygen travels down the trachea to lungs

Question 8

alveoli adaption

Answer 8

• good blood supply
• large surface area
• thin walls, easy for diffusion