Question

class 8 ch. 8 the cell​

Answer 1

Answer:

Explanation:

The cell is the smallest and functional unit of the body . Manny cell come together and forms a tissue. Manny tissue come together and forms a organ . Manny organs come together and forms a organ system and manny organ systems come together to make a human body.

Answer 2

Answer:

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Cells are the basic building blocks of all living things. Cell is a structural and functional unit of living organisms.

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Cells may be compared to bricks. Bricks are assembled to make a building. Similarly, cells are assembled to make the body of every organism. All organisms are made up of cells.

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All basic chemical and physiological functions of living beings – for example, repair, growth, movement, immunity, communication, and digestion etc are carried out inside the cells.

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Who discovered cells?

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Cells were discovered by Robert Hooke. In 1665, the English scientist Robert Hooke observed slices of cork (bark of tree) which is part of bark of a tree, under a simple magnifying device. He noticed partitioned boxes or compartments in the cork slice.

The instrument used to see cells is microscope.

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Microscope is an instrument which is used to magnify the very small objects, which cannot be seen with the naked eye. It was discovered by Anton van Leeuwenhoek. The Ancient microscope is the microscope which discover the cell.

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