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Standard VII

Biology

Adaptations in Aquatic Animals

are supplied ...

Question

___ are supplied with blood vessels for exchange of gases in fishes.

Fins

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Scales

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Gills

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Tail

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Solution

The correct option is C Gills
Fishes breathe with the help of gills. They expose their gills to water with the help of muscles. Gills have rows of tiny blood vessels. These blood vessels are very thin and they allow oxygen dissolved in water to diffuse into their blood.

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Similar questions

Q. The diagrams given are cross sections of blood vessels.

(i)

Identify the blood vessels

A, B

and

C

(i i)

Name the parts labelled

1

3

(i i i)

Name the type of blood that flows through

A

(i v)

Mention one structural difference between

A

and

B

(v)

In which of the above vessels does exchange of gases actually take place?

The exchange of oxygen and other gases between air in the lungs and blood vessels takes place in:

Question 5
Fishes breathe with the help of gills which are richly supplied with blood vessels. The gills help the fish to

(a) take in oxygen from air.
(b) take in oxygen dissolved in water
(c) absorb nutrients present in water
(d) release waste substances in water

Q. The given figure shows diagrammatic representation of exchange of gases at the alveolus and the body tissues with blood and transport of oxygen and carbon dioxide. Identify the blood vessels A to D.

The exchange of oxygen and other gases between lungs and blood vessels takes place in_____.

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___ are supplied with blood vessels for exchange of gases in fishes.

The correct option is C GillsFishes breathe with the help of gills. They expose their gills to water with the help of muscles. Gills have rows of tiny blood vessels. These blood vessels are very thin and they allow oxygen dissolved in water to diffuse into their blood.

The correct option is C Gills
Fishes breathe with the help of gills. They expose their gills to water with the help of muscles. Gills have rows of tiny blood vessels. These blood vessels are very thin and they allow oxygen dissolved in water to diffuse into their blood.