Page 96 - Ripples SCIENCE 7 - TEJPUR Edition 2024 Answer Key

2. One complete cycle of contraction and relaxation of the heart muscles is called

................... .
Ans. cardiac cycle

3. The ................... cells in our body fight against germs.
Ans. White blood

4. ................... is the fluid connective tissue that flows in blood vessels.

Ans. Blood
5. Loss of water in the form of vapour through leaves is called ................... .

Ans. transpiration.
6. The tiny filters that are capable of filtering blood and eliminating the nitrogenous

waste material are known as .................... .
Ans. nephron

7. Blood is a ................... coloured fluid which flows in our body through ................... .

Ans. red, blood vessels.
C. State whether the following statements are true (T) or false (F).

1. The presence of haemoglobin gives red colour to the blood.
2. From skin, extra salts are removed along with water as sweat.

3. Translocation is the term used for transport of food from leaves to other parts of
plants.

4. Transpiration helps in eliminating extra water from plants in the from of water vapour.

5. In plants, phloem helps in the transportation of water.
6. White blood cells helps to fight with disease-causing germs.

7. Sweating keeps our body hot during hot summer days.
Ans. 1. (T) 2. (T) 3. (T) 4. (T) 5. (F) 6. (T) 7. (F)

D. Very short-answer questions
1. Name the structural and functional unit of kidneys.

Ans. Nephron

2. Name the plant tissue which transports water and minerals.
Ans. ylem

3. Name the instrument used to measure blood pressure.
Ans. Sphygmomanometer

4. Name the vein that carries oxygenated blood.
Ans. Pulmonary vein

5. Name the instrument by which doctors check our heartbeat.
Ans. Stethoscope

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