The respiratory system

Question 1

Goblet cells

Answer 1

• Secrete Mucus
• Mucus traps pathogens

Question 2

Inhaliation

Answer 2

• External intercoastal muscles contract
• Ribs move up and out
• Diaphragm contracts/flattens
• Volume inside of thorax increases
• Pressue decreases
• Air is drawn into lungs

Question 3

Exhaliation

Answer 3

• Internal intercoastal muscles contract
• Ribs move down and in
• Diaphragm relaxes/becomes dome shaped
  -Volume inside thorax decreases
• Pressure increases
• Air forced out of lungs

Question 4

Air you inhale will contain more ….. than air you exhale

Answer 4

Oxygen

Question 5

Air you exhale contains more …….. than air you inhale

Answer 5

Carbon Dioxide

Question 6

Adaptations of alveoli for gas exchange

Answer 6

• Large surface area
• Thin (short diffusion distance)
• Moist (to dissolve gases)
• Good blood supply