Match structures given in Column I with functions given in Column II.

Column I                                     Column II 

(i) Stomata                               (a) Absorption of water

(ii) Xylem                                  (b) Transpiration

(iii) Root hairs                          (c) Transport of food

(iv) Phloem                               (d) Transport of water

                                                   (e) Synthesis of carbohydrates

Fill in the blanks.

(i) The blood from the heart is transported to all parts of the body by the ___________.

(ii) Haemoglobin is present in ___________ cells.

(iii) Arteries and veins are joined by a network of ___________.

(iv) The rhythmic expansion and contraction of the heart is called ___________.

(v) The main excretory product in human beings is ___________.

(vi) Sweat contains water and ___________.

(vii) Kidneys eliminate the waste materials in the liquid form called ___________.

(viii) Water reaches great heights in the trees because of suction pull caused by ___________.

Choose the correct option:

(a) In plants, water is transported through

 (i) xylem                      (ii) phloem

(iii) stomata                (iv) root hair

(b) Water absorption through roots can be increased by keeping the plants

(i) in the shade           (ii) in dim light

(iii) under the fan      (iv) covered with a polythene bag

Why is transport of materials necessary in a plant or in an animal? Explain.

What will happen if there are no platelets in the blood?

What are stomata? Give two functions of stomata.

Does transpiration serve any useful function in the plants? Explain.

What are the components of blood?

Why is blood needed by all the parts of a body?

What makes the blood look red?

Describe the function of the heart.

Why is it necessary to excrete waste products?

Draw a diagram of the human excretory system and label the various parts.