Page 5 - e book prim 6

Delta Modern Language Schools
Science department
Grade 6
1st term 2024- 2025

Cell needs

• The cell needs energy to carry out all its own life processes. G.R
- To survive and get rid of waste materials.

• Cell needs food (nutrients) and oxygen. G.R

-To get energy.

• Cell need water. G.R

-To survive.

* Note:-

➢ Water enters the cell through cell membrane.

➢ If there is much water enters the cell it will swell until it bursts, to prevent
this; cells are able to maintain the proper water balance on both sides of cell
membrane.

➢ New cells come from existing cells.

Brief history of the cell

1. The first scientist who discovered the cell is Robert Hooke.

➢ The structure of microscope: -

Base
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