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Find out what skin donation is useful for.

The skin is the largest human organ. Its function is sense of touch, covering to protect us from heat and cold, and from environmental factors such as chemicals,

Ultraviolet radiation and bacteria. Donated skin is used as a dressing for severe burns patients who do not have healthy skin on their body that can be used to graft on their wounds.


Also help in relieving the patient's pain and discomfort, prevents risk of infection.


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5

Differentiate between:

Plants cells and animal cells:

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Differentiate between:

Cell membrane and cytoplasm:

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In order to observe protozoa like amoeba and paramecium, collect the petals of some flowers. Place them in water for a day or two. Observe a drop of this water under a microscope.

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Peel off the thin membrane inside a layer of onion. Place it on a glass slide and put a drop of iodine on it. Cover it with a cover slip. Now your slide is ready. Observe it under a microscope. You will see cells which have a nucleus and are enclosed in a cell wall. Draw the onion cells as you see them under the microscope.