MCQ
Blood circulation in insects is:
- AFlows in arteries and veins
- BWith red blood corpuscles
- COpen type
- DAbsent
Explanation:
The blood circulatory system of insects is the open type where hemolymph flows freely within the body cavity or hemocoel. There are a heart and aorta but no capillaries and veins. The circulatory system consists of a body cavity or sinus, heart, and hemolymph.
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|
Column $I$ (Terms) |
Column $II$ (Features) |
| $A.$ Exocrine gland | $I.$ They help to stop substances fromleaking across a tissue |
| $B.$ Endocrine gland | $II.$ Hormones are secreted directlyinto the fluid bathing the gland |
| $C.$ Tight junctions | $III.$ They perform cementing to keepneighbouring cells together. |
| $D.$ Adhering junctions | $IV.$ Secretes mucus, saliva, earwax,oil, milk, digestive enzymes andother cell products |