MCQ
Tube feet are the characteristic structures of
- AJellyfish
- BCuttlefish
- ✓Starfish
- DCrayfish
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| Gas | Atmospheric Air | Alveoli |
| $O_{2}$ | $159$ | $A$ |
| $CO _{2}$ | $0.3$ | $B$ |
Reason : Allergens in the environment on reaching human body stimulate mast cells in certain individuals.
$I.$ Sacral
$II.$ Coccygeal
$III.$ Thoracic
$IV.$ Cervical
$V.$ Lumber
- Cancer of lung
- Bronchitis
- Gastric ulcer
- Emphysema