Q51 of 105 Page 141

What are the functions of the following organs ?

(a) Heart (b) Brain


(c) Roots (d) Leaves

(a) Heart – It pumps blood throughout the body.

(b) Brain – It controls the activities of other parts of the body.


(c) Roots – These help in absorption of water and minerals.


(d) Leaves – These are responsible for synthesis of food.


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What is an organ system ?

(a) Give two examples of organ systems in animals.


(b) Name the two main organ systems in plants .

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Which of the following are plant organs and which are animal organs ?

Brain, Leaf, Lungs, Roots, Stem, Kidneys, Flower, Heart

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What is the shape of red blood cells in human blood? What function do red blood cells perform ?

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State the difference between prokaryotes and eukaryotes.