Question

Q10. Give reasons for the following:


•The wall of trachea is supported by cartilage rings.
•We get muscle cramps after heavy exercise.
•We are advised to breathe through our nose and not through the mouth.
•The rate of breathing in aquatic organisms is faster than in terrestrial animals.
•The lungs do not collapse even after forceful expiration.
•While eating you are advised not to talk.
•Herbivores have longer small intestine than carnivores
•Capillaries are thin walled
•Ventricles have thicker walls than auricles
•Veins have valves but arteries do not
•It is necessary to separate oxygenated and deoxygenated blood in birds and mammals
•The multicellular organisms need a transportation system for carrying food and oxygen

Answer 1

Explanation:

sorry for leaving 2 ques, bad and short handwriting