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

a- iii Yeast is a unicellular organism used in alcohol production. Yeast are also known as anaerobes. b- iv The diaphragm separates the chest cavity containing the heart and lungs. c- i The earthworm respires through its skin. The skin of an earthworm feels moist and slimy which allow gases to pass through it. d- v The stomata are small openings present on the leaves. It helps in the process of transpiration as well as in the exchange of gasses. e- ii Fishes breathe through their gills. Gills are well supplied with blood vessels exchange of gases. f- vi Frogs breathe through both lungs and skin. Frogs are known as amphibian. Column I Column II a. Yeast i. Alcohol b. Diaphragm ii. Chest cavity c. Skin iii. Earthworm d. Leaves iv. Stomata e. Fish v. Gills f. Frog vi. Lungs and skin

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 : CLASS VII>Chapter 10 - Respiration in Organisms>Exercises

Exercises

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Questions from Exercises with Hints & Solutions

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SCIENCE : CLASS VII>Chapter 10 - Respiration in Organisms>Exercises>Q 6

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

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SCIENCE : CLASS VII>Chapter 10 - Respiration in Organisms>Exercises>Q 7

During heavy exercise the breathing rate of a person slows down.

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SCIENCE : CLASS VII>Chapter 10 - Respiration in Organisms>Exercises>Q 7

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

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SCIENCE : CLASS VII>Chapter 10 - Respiration in Organisms>Exercises>Q 7

Frogs breathe through their skins as well as their lungs.

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SCIENCE : CLASS VII>Chapter 10 - Respiration in Organisms>Exercises>Q 7

The fishes perform respiration through gills.

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SCIENCE : CLASS VII>Chapter 10 - Respiration in Organisms>Exercises>Q 7

The size of the chest cavity increases during inhalation.

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SCIENCE : CLASS VII>Chapter 10 - Respiration in Organisms>Exercises>Q 8

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 : CLASS VII>Chapter 10 - Respiration in Organisms>Exercises>Q 9

The mountaineers carry oxygen with them because