Cells as the basic Units of Life - Coggle Diagram
Cells as the basic Units of Life
9.1: What are living things made of?
Our skin is made up of skin cells.
Red blood cells and white blood cells can be found in out blood.
Bone cells make up our bones
Parts of an Animal Cell
An animal cell has 3 parts
a thin layer surrounding the cytoplasm
Controls substances entering or leaving the cell. It only allows some substances to pass through.
It is flexible & allows the cell to change shape.
a jelly-like substance that fills the cell
contains other parts of the cell.
contains water & food materials
controls all activities in the cell
contains genes which store information that is passed on from parents to their children.
9.2: What are the different types of cells & their functions?
A bone cell is a specialised cell. It has a specific function, that is to make bones that support our body.
A bone cell, like most animal cells, has nucleus, cytoplasm & cell membrane
They contain a lot of calcium & phosphates. These are chemicals that help to keep our bones healthy, strong & solid. As we grow old, these chemicals are lost from our bones & it become weaker.
red blood cells
Blood is an important tissue of our body. Blood carries nutrients that our cells need. It also removes waste materials & carbon dioxide gas from cells.
Blood contains different types of cells. One important type of cell is the red blood cell.
Red blood cells transport oxygen from the lungs to the rest of the body.
Red blood cells do not have a nucleus because they need to carry more oxygen. They are red in colour because they contain a red pigment called haemoglobin. Oxygen binds to haemoglobin in the red blood cell & is carried around the body.
The muscle is another specialised cell. It has a cell membrane, nucleus & cytoplasm.
Muscle cells contract & relax to help us move
For example, muscle cells in our arms contract & relax, allowing us to move our arms.