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Cells and the Microscope (Cells (Key words (Nucleus (Control centre,…
Cells and the Microscope
Cells
What living things are made up of
Most are two small to see by the naked eye
Can divided
Called division
Allows living things two grow
Two identical cells
Animal cells
Main parts
Cell membrane
Nucleus
Cytoplasm
Plant cell
Main parts
Cell membrane
Nucleus
Cytoplasm
Cell wall
Key words
Cell membrane
Thin layer
Surrounds the cell
Nucleus
Control centre
Contains genes that control inherited characteristics
Each cells nucleus is identical
Cytoplasm
Water fluid
Found between the cell membrane and nucleus
Cell wall
Found outside the cell membrane
Only in plants
The way in which cells are organised
Cells do not work alone
Tissues
A group of similar cells which carry out the same function
Example
Red blood
Carries oxygen
Muscle
Contracts to allow movement
Organs
A structure that contains two or more tissues working together
Example
Heart
Muscle
Red blood
System
A number of organs working together
Example
Sensory system
Eyes
Skin
Ears
Nose
Tongue
Organisms
Living thing
Example
Human
Tree
Composed of systems
Microscope
Parts
Eyepiece
Enlarges the image of the object
Focus Knobs
Allow clear sharp images
Nosepiece
Rotates so that different lenses can be used
Objective lens
Located on the nosepiece
It enlarges the image of the object
Stage
Where the slide is placed for viewing
Mirror
Used to shine a light source through the slide