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Chapter 11 Transportation in Animals and Plants, Ans 1:, Column I, , Column II, , i) Stomata, , (b) Transpiration, , (ii) Xylem, , (d) Transport of water, , (iii) root hairs, , (a) Absorption of, water, , (iv) Phloem, , (c) Transport of food, , Ans 2, (i) The blood from the heart is transported to all parts of the body by the arteries ., (ii) Haemoglobin is present in red blood cells., (iii) Arteries and veins are joined by a network of capillaries., (iv) The rhythmic expansion and contraction of the heart is called heartbeat., (v) The main excretory product in human beings is urea ., (vi) Sweat contains water and salts ., (vii) Kidneys eliminate the waste materials in the liquid form called urine ., (viii) Water reaches great heights in the trees because of suction pull caused by transpiration ., Ans 3., a) i) Xylem, b) iii) under the fan, Ans 4.The transport of materials is important in a plant or in an animal, because their cells, require a constant supply of nutrients, oxygen, and water for the production of energy and other, activities . Also, transportation is needed to carry away the waste products produced by the body., Ans5. If there are no platelets, then blood will not clot as platelets release blood clotting factor at, the site of injury and stop further bleeding., Ans6. Tiny pores present on the leaf surface are known as stomata., Functions of stomata, (a) Helps in exchange of gasses, (b) Evaporation of water through leaves occurs due to stomata., Ans7. Function of transpiration
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(a) Helps in the rise of water absorbed by the roots to higher parts of the plant., (b) helps in the cooling effect of plants, preventing drying out in the hot sun., Ans 8 Components of blood are:, a)Red blood cells,, b) white blood cells,, c) platelets and, d) plasma, Ans9 Functions of blood, a) For the transport of oxygen to all parts of our body, b) To expel out carbon dioxide from our body, c) Blood maintains a constant body temperature., d) It helps in removal of waste, Ans 10.The presence of a red pigment called haemoglobin in red blood cells (RBC) makes the, blood appear red., Ans 11.Function of heart:, a) The primary function of the heart is to pump blood throughout the body., b) It supplies oxygen and nutrients to the body and removes carbon dioxide and wastes from, the blood., c) maintain blood pressure., Ans12. When our cells perform their functions, certain waste products are released. These waste, products are toxic and harmful for us. Hence they need to be removed from the body., , Ans13.
