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 Wall Nucleus Vacuole Chloroplast Cell Membrane 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 Video- epithelia cells Look whos talking video The female egg cell Root hair cell 15/04/2018

Red blood cell Palisade (leaf) cell Nerve (neurone) cell Video- epithelia cells Nerve (neurone) cell

Sex Cells - Sperm In males, the sex cells are called sperm. Sperm are produced in sex organs called testes. 15/04/2018 6

An egg is so big that this is how small a sperm looks next to it. 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. 7

Photograph of many sperms using a special microscope 15/04/2018

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 Specialised Plant cells DIAGRAM FUNCTION DIAGRAM FUNCTION

Match the cell to the job 7A Building living things - Different cells for different jobs Cell plenary Match the cell to the job 1 2 Red blood cell Nerve cell Egg cell Palisade (leaf) cell Root hair cell 3 TEACHER’S NOTES Answers: Job No1 – Nerve cell Job No2 – Egg cell Job No3 – Palisade cell Job No4 – Root hair cell Job No5 – Red blood cell 4 5

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Photograph of many sperms using a special microscope 15/04/2018

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 DIAGRAM Function Specialisation Sperm Egg A tail and coating on the head Reproduction Sperm Egg Epithelial Cell Root hair cell Reproduction Contains food To get rid of dust and mucus Hairs called cilia To absorb water and minerals from soil Long and thin

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

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Specialised cells CELL DIAGRAM Function Specialisation Sperm Egg Epithelial Cell Root hair cell