What are living things made of?. Cells are the building blocks of life – they come in all shapes and sizes. Some organisms are unicellular – they are made up of only one cell.
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What are living things made of?
Cells are the building blocks of life – they come in all shapes and sizes.
Some organisms are unicellular– they are made up of only one cell.
Other organisms are multicellular– they are made up of many types of cells. Can you think of some examples of unicellular and multicellular organisms?
Special Types of Cells
A cell is specialized for its function.
How Does a Cell Resemble a City?
The human body contains billions of cells....
Cells in different parts of the body are specialized which means they all perform different jobs.
Red Blood Cells Carry Oxygen
Red blood cells have a special dome shape to help them carry oxygen around our body.
Nerve Cells Carry Impulses
Nerve cells are long, sleek, and contain dendrites which help them to send signals quickly.
Sperm cells Fertilise eggs
They have a long tail to help them swim and their head contains the nucleus.
Muscle Cells Move Joints
Contains fibres that help the cell contract.
White Blood cells help Kill Bacteria
They contain chemicals called enzymes that kill and destroy bacteria.
Goblet Cells Secrete Mucus
The Goblet cells make mucus and it is used to protect other cells.
Write the name of the cell and the description that matches in your notes.
Many specialised cells together make up an organ.
Many organs together make up a system.
How Many body Systems can you think of?