GASEOUS EXCHANGE IN AMPHIBIANS

1
Gaseous exchange ampibians

1. By Domnic otieno
2. biology and chemistry teacher s
3. Sega girls sec-siaya

2
Where is gaseous exchange taking place?
Buccal surface
Gill in tapole
Skin
3
Describe mechanism of gaseous exchange in frog

• Inhalation
• Mouth floor is lowered volume of thoracic cavity
  increases pressure decreases allowing air to
  flow in through open nostrils nostrils then
  close mouth floor is raised air is forced into
  the lungs oxygen diffuses into capillaries
  carbon (IV) oxide diffuses out of capillaries
  into the lungs

4
Exhalation

• Mouth floor is lowered as nostrils remain
  closed volume increases in the mouth cavity
  pressure decreases in the mouth cavity sucking
  in air from the lungs nostrils open mouth floor
  is raised pressure increases pushing air out of
  nostrils.