Conditions necessary for skin to act as respiratory organ are:
1. Skin must be smooth and without exoskeleton.
2. Skin must have lining of mucous cells to keep it moist.
3. Skin must be thin.
4. Skin must have a rich supply of blood.
On what factors does the rate of diffusion in the alveoli depend on?
(a) Far more oxygen is released from oxyhaemoglobin in a more active tissue than in a less active one.
(b) Oxygenation of blood promotes the release of carbondioxide from blood in the lungs.
