5 Specialised Cells 3r6n6y

Specialised cells

LO: to recognize that some cells have specialised structures to do special functions

Some cells come in different shapes and sizes because they have special jobs to do in the body and plants With your partner discuss and try to make a list of as many specialised cells as you can. A merit for the pair that can list the most. Use the pictures to help you

Cell Membrane

Cell Wall Vacuole

Nucleus

Chloroplast Cytoplasm

Look at the different types of specialised cells and discuss how each one is adapted to it’s function Epithelial cell The sperm cell Videoepithelia cells

Look whos talking video

The female egg cell

Root hair cell

25/04/2017

Red blood cell

Palisade (leaf) cell

Nerve (neurone) cell

Videoepithelia cells

Sex Cells - Sperm • In males, the sex cells are called sperm. • Sperm are produced in sex organs called testes.

25/04/2017

Sex cells – egg (ovum) • In females, the sex cells are called eggs or ova. • Eggs are produced in sex organs called ovaries. nucleus containing chromosomes

cytoplasm

membrane jelly coat

An egg is so big that this is how small a sperm looks next to it.

Photograph of many sperms using a special microscope

25/04/2017

Photograph of egg surrounded by sperm using a special microscope.

TASK: Cut out the description and diagram then match them up in your book under the headings specialised animal cell or specialised plant cell Specialised Animal cells DIAGRAM

FUNCTION

Specialised Plant cells DIAGRAM

FUNCTION

7A Building living things - Different cells for different jobs

Cell plenary

1

Match the cell to the job 2

Red blood cell Nerve cell

3

Egg cell Palisade (leaf) cell Root hair cell

4

5

Photograph of many sperms using a special microscope

25/04/2017

Photograph of egg surrounded by sperm using a special microscope.

Sperm vs Egg • Put the keywords below into two groups: • i) Sperm ii) Egg

Small in size Found in males

Has a food store

Swim using a tail

Large in size

No food store

Found in females

Cannot move much

Millions made

Only a few made

Specialised cells CELL

Function

Specialisation

Reproduction

A tail and coating on the head

Reproduction

Contains food

Epithelial Cell

To get rid of dust and mucus

Hairs called cilia

Root hair cell

To absorb water and minerals from soil

Long and thin

Sperm

Egg

DIAGRAM

Homework Deg Cell X Due Wednesday (next lesson) Design a special plant cell that can move from plant to plant by grabbing on to ing animals Add descriptions and labels to your drawing

Ask the expert!

Specialised cells CELL Sperm

Egg

Epithelial Cell

Root hair cell

DIAGRAM

Function

Specialisation