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Answer1:, , Column, , ()Stomata, , (i) Xylem, , (i) Root hairs, , (iv)Phloem, , Column I, , (b) Transpiration, (d) Transport of water, (a) Absorption of water, (c) Transport of food
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2. Fill in the blanks., , 2., , (i), , The, , blood, , from the heart is transported to all, , parts of the body by, , the a t i e s, (iil), , present in Ld blecd cells., Arteries and veins are joined by a network of CaLLLOHLes, , iv), , The rhythmic expansion, , (v), , The main excretory product in human beings is, , (ii), , Haemoglobin, , is, , and contraction of the heart is called, , AL, , (vi), , Sweat contains water and, , (vii), , Kidneys eliminate the waste materials in the liquid, , form called, , UUme_, , (vii), , heights in the trees, amARLaTTe., , Water reaches great, , caused by, , because of suction, , pull
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3. Choose the correct, , (a), , optiona:, In plants, water is transported through, (11) phloemn, xylem, , (iii), , b), , stomata, (iv) root hair, Water absorption through roots can be increased by keeping the, , plants, in the shade, , (i), , in dim light, , under the fan, , (iv), , covered with, , a, , polythene bag, 10
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Question 4:, , Why is transport of materials necessary in a plant or in an animal? Explain, , Answer 4:, The cells of different organs of plants and animals need various necessary substances to, carry out many metabolic activities and different type of waste products are created, during these metabolic activities So, transport of materials is necessary to supply the, required substances and to remove the waste products, , Question 5:, , What will happen if there are no platelets in the blood?, , Answer 5:, Platelets are responsible for clatting of blood. If there are no platelets, the blood would, not clot in case of an injury. This will lead to excess blood loss and finally in death of the, person, , Question 6:, What are stomata? Give two functions of stomata, Answer 6:, The numerous pores under the surface of leaf are called stomata Transpiration and, exchange of gases (carbon dioxide and oxygen) are the main functions of stomata.
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Question, 7, Does transpiration, serve any useful function, , in the plants? Explain, , Answer 7, , very important, transpiration pull, which is responsible, and other trees., Transpiration, , serves, , function, , in, , plants Transpiration, , for the rise of water to, , great heights, , creates the, in tall, , plants, , Question 8:, What are the components of blood?, , Answer 8:, Blood is, , a, , liquid, which, , has cells of various kinds, , suspended, , in it Main, , components, , of, , blood are:, , blood is called plasma, The fluid part, of, the, Plasma:, RBC: One type of cells are the red blood cells (RBC), , called haemoglobin., >WBC: The blood also has white blood cells, , which contain a red pigment, , (WBC) which fght against germs that, , may enter our body., , Platelets: The clotting of blood is caused by another type of cells in the, , blood, called, , platelets, , Question 9:, Why is blood needed by all the parts of a body?, Answer 9, , Blood transports substances like digested food from the small intestine to the other parts, from, the cells the body. It transports, its, of the body, needs, certain, substances, to, perform, functions., Additionally, every part, that, is needed, all parts the, waste, creates, some, products, for, removal, Blood, by, of, body, various substances can be supplied to them and waste can be removed from them., also, of, the lungs to, of the body. It carries oxygen, waste for removal from the body. So, it axts as a carrier of various substances. Every part, so, , Question 10:, What makes the blood look red?, , Answer 10, The presence of haemoglobin makes blood appear red.
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Question l1:, Describe the function of the heart.t, , Answer, The heart is an organ which beats continuously to act as a pump for the transport of blood,, which carres other substances with it. The heart pumps the deoxygenated blood to the, , lungs for oxygenation and receives oxygenated blood from lungs t, , pumps the, , axygenated blood to different parts of the body., , Vena Cava, , NOrta, , Pulmonary artery, , _Punorary vein, Right ar, , r, , e, , L t atrkam, , piete, the, two, , -lelt verntricle, , haves, ventrke -, , Setom f huanan heart, , Question 12:, Why is it necessary to excrete waste products?, , Answer 12:, their, certain, are released. These, When, cells, perform, functions,, waste, products, toxic for our body and hence need to be removed from the body., our, , are
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Question 13:, Draw, , diagram of the, Answer 13:, a, , human, , excretory system, , and label the various, , parts., , KIdney, , Ureter., , Urinary bladder, , Urethra, Urinary opening, , Human excretory systemn
