Given below is a square of letters in which are hidden words related to respiration organism. These words may be present in any direction upwards, downwards, or along the diagonals. Find the words for your respiratory system. Clues about those words are given below the square. (i) The air tubes of insects. (ii) Skeletal structures surrounding a chest cavity. (iii) The muscular floor of the chest cavity. (iv) Tiny pores on the surface of a leaf. (v) Small opening on the sides of the body of an insect. (vi) The respiratory organs of human beings. (vii) The opening through which we inhale. (viii) An anaerobic organism.

The names of the organs of the respiratory system are given below: (i) The air tubes of insects - Trachea. Insects have spiracles, that are openings on exoskeletons to allow air to enter the trachea. These are connected to tracheal tubes that deliver oxygen directly into the tissues of insects. (ii) Skeletal structures surrounding a chest cavity - Ribs. It protects the internal organs such as heart from mechanical shock and injury. (iii) The muscular floor of the chest cavity - Diaphragm. (iv) Tiny pores on the surface of a leaf - Stomata. Stomata help in transpiration process. (v) Small opening on the sides of the body of an insect - Spiracles. These are connected to tracheal tubes that deliver oxygen directly into the tissues of insects. (vi) The respiratory organs of human beings - Lungs. Except for this nose, pharynx, larynx, trachea, bronchi, lungs, and diaphragm are also play an important role. (vii) The opening through which we inhale - Nostrils. (viii) An anaerobic organism - Yeast. They can produce alcohol by the process of fermentation.

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 10 - Respiration in Organisms>EXERCISES>Q 8

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Plants carry out photosynthesis only during the day and respiration only at night.

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Important Questions on Respiration in Organisms

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 10 - Respiration in Organisms>EXERCISES>Q 8

Frogs breathe through their skins as well as their lungs.

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 10 - Respiration in Organisms>EXERCISES>Q 8

The fishes perform respiration through gills.

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 10 - Respiration in Organisms>EXERCISES>Q 8

The size of the chest cavity increases during inhalation.

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 10 - Respiration in Organisms>EXERCISES>Q 9

Given below is a square of letters in which are hidden words related to respiration organism. These words may be present in any direction upwards, downwards, or along the diagonals. Find the words for your respiratory system. Clues about those words are given below the square.

Question Image

(i) The air tubes of insects.
(ii) Skeletal structures surrounding a chest cavity.
(iii) The muscular floor of the chest cavity.
(iv) Tiny pores on the surface of a leaf.
(v) Small opening on the sides of the body of an insect.
(vi) The respiratory organs of human beings.
(vii) The opening through which we inhale.
(viii) An anaerobic organism.

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 10 - Respiration in Organisms>EXERCISES>Q 10

The mountaineers carry oxygen with them because

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 10 - Respiration in Organisms>EXERCISES>Q 11

Give two examples of the following:

Animals that breathe through gills

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