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प्रश्न
Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?
उत्तर १
It is necessary to separate oxygenated and deoxygenated blood to maintain efficient supply of oxygen into the body. This system is essential in animals that have high energy need. For example, animals like mammals and birds which constantly use this energy to maintain their body temperature.
उत्तर २
Mammals and birds are warm blooded animals. Their energy requirement is high since they constantly require energy to maintain their body temperature. Hence, it is necessary to separate the oxygenated and the deoxygenated blood in mammals and birds as this separation allows a highly efficient supply of oxygen to the blood cells. This is important for producing a lot of energy and for maintaining the body temperature.
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संबंधित प्रश्न
In cockroaches, air enters the body through ______.
Match the items in Column I with those in Column II:
| Column I | Column II | ||
| (a) | Yeast | (i) | Earthworm |
| (b) | Diaphragm | (ii) | Gills |
| (c) | Skin | (iii) | Alcohol |
| (d) | Leaves | (iv) | Chest cavity |
| (e) | Fish | (v) | Stomata |
| (f) | Frog | (vi) | Lungs and skin |
| (vii) | Tracheae |
Frogs breathe through their skins as well as their lungs.
The fishes have lungs for respiration.
Fill in the Following Blanks with Suitable Words:
Yeast Undergoes ___________ Respiration Whereas Amoeba Undergoes _________ Respiration.
Fish breathe with the help of gills which are richly supplied with blood vessels. The gills help the fish to
Earthworms and frogs breathe through their skin because of which the skin of both organisms is
Mark the following statement as True or False. Correct the false statement.
Frogs can breathe through their skin as well as lungs.
Cockroaches breathe with the help of air tubes called ___________.
On average, an adult human being at rest breathes 15–18 times per minute. The breathing rate, however, may differ under different conditions. Arrange the following activities given in the box in order of increasing breathing rates and give a reason for your answer.
sleeping, cycling, brisk walking, watching T.V
Match the names of organisms in Column I with their organs of breathing given in Column II.
| Column I | Column II | ||
| (a) | Butterfly | (i) | Lungs |
| (b) | Earthworms | (ii) | Gills |
| (c) | Sparrow | (iii) | Spiracles |
| (d) | Fish | (iv) | Skin |
