MCQ
In rabbit, alveolar ducts originate from:
- ABronchi
- BTrachea
- CBronchiole
- DRespiratory bronchiole
Explanation:
In the case of rabbits, respiratory bronchiole is formed from the division of tertiary bronchus and then it divides further than from respiratory bronchioles. That led to the formation of the alveolar duct and alveoli. It delivers air to the small alveolar sac where oxygen and carbon dioxide exchange takes place.
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$(i)$ Leucocytes disintegrate in the spleen and liver.
$(ii)$ $RBC, WBC$ and blood platelets are produced by bone marrow.
$(iii)$ Neutrophils bring about destruction and detoxification of toxins of protein origin.
$(iv)$ The important function of lymphocytes is to produce antibodies
| Excretory structure/ organ | | Animals | |
| A | Protonephridia | i. | Prawn |
| B | Nephridia | ii. | Cockroach |
| C | Malpighian tubules | iii. | Earthworm |
| D | Green gland or Antennal gland | iv. | Flatworms |