Cells Lesson Objectives

• Describe what a cell is (L4/L5)•Label the parts of a cell (L4)• Know the difference between a plant cell and an animal cell (L4)•Explain the function of the cell structures (L5)

StarterBlind drawing game

• Teams of 3•Number players 1-3

What is a cell?A cell is the very smallest unit of living matter.

All living things, including plants and animals, are made up of cells.

What is a cell?

What is a cell?

There are many different kinds of cells, doing many different jobs in a plant or animal.

What is a cell?

Animal and plant cellsAnimal Cells

Cell surface membrane

Cytoplasm

Nucleus

Cell membraneCell Surface MembraneThis surrounds the cell and holds the cell together. It also controls what chemicals can enter and leave the cell.

Cell membraneThe nucleus controls the cell. Inside the nucleus is DNA which contains genetic information.

Nucleus

Cell membraneCytoplasm is a jelly-like mixture of chemicals where most of the work of the cell takes place

Cytoplasm

Plant cell partsPlant cells may contain some extra parts.

Parts of a Plant Cell

Cell surface membrane

NucleusCytoplasm

Chloroplasts (plant cells)Chloroplasts

Chloroplasts

Chloroplasts are disc shaped and contain chlorophyll (green pigment) for photosynthesis.

Chloroplasts (plant cells)Cell Wall

Cell Wall

A cell wall which is a strong outer layer to support the cell and give it shape.

Chloroplasts (plant cells)Vacuole

Vacuole

A vacuole where the plant cell stores sap (the food that it has made; a mixture of sugars, salts and water).

Plant cells may contain some extra parts.

Copy!

Cell surface membrane

NucleusCytoplasm

Cell walla strong outer layer to support the cell and

give it shape

Vacuolewhere the plant cell

stores sap

Chloroplasts contain

chlorophyll (green

pigment) used for

photosynthesis

A PLANT CELL

Cell membrane – lets substances such as

dissolved gasses in and out of the cell.

Cytoplasm – where the chemical reactions that

go on in the cell happen.

Cell wall – a tough, supporting wall made

from cellulose. It’s like a cardboard box

surrounding the cell. It helps the cell keep its

shape.

Chloroplasts – green bits which contain

chlorophyll for photosynthesis.

Vacuole – A space inside the cell filled with

a watery liquid. This helps the cell to keep its

shape.

Draw a line to match the parts of the cell to the correct cell. Some parts are in both animal and plant cells!

Animal cell

Plant cell

Nucleus– acts like the brain of the cell. Where

all the information is held.

Homework project

• Create a model of an animal cell or a plant cell

• Use the level ladder to help you get the best level possible

Model cells

Interesting cell facts:Like all living things, cells die. If you watched a clock for one minute, about three billion cells in your body die.

x 3000000000

Interesting Cell Facts

Interesting cell facts:

In that same minute, about three billion cells divided so that all the cells that died were replaced.

x3000000000

Interesting Cell Facts

Interesting cell facts:

Dead skin cells flake off and dead cells from internal organs will pass through and out of the body with waste products.

Interesting Cell Facts

Interesting cell facts:

The length of time cells live can vary.

Interesting Cell Facts

Nerve Cells

100 years

White blood cells 13 days

Red Blood Cells

120 days

Liver cells 18 months