Movement of cells

Cells move around and pretty much everywhere inside your body. But why exactly do they move? They move because our bodies need something called glucose and oxygen. Some of our parts need it so thats why cells move around. Some cells make something called waste products, for example carbon dioxide which is produced during respiration. It passes out of the cell and then to the lungs where you breathe it out. Now lets look at how they move. They move by a process called diffusion, diffusion is the spreading of particles from an area of high concentration to an area of low concentration.

Diffusion in Plant cells

Now that we have learnt diffusion in animal cells let s learn about diffusion in plant cells. Plants need a water supply every so often for photosynthesis. Water moves into the plant through the root hair cells. The water molecules move from soil (high concentration) to the root hair cell (low concentration). Then water travels from root hair cells to other cells.

Unicellular organisms

Unicellular organisms are organisms that are made up of just one cell. Some types of unicellular organism are Euglena (Yoog-leena) and Amoeba (Am - oe - ee - ba). What is 'Euglena' Euglena is a microscopic unicellular organism found in fresh water and 'Amoeba' is an unicellular organism with no fixed shape and can be found in fresh water, salt water, wet soil and even in animals!

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Have a look at the Cells unit for Biology, it will help you for later and some of the quiz questions.