Specialised Cells
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Transcript of Specialised Cells
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Specialised Cells
• Plants and animals are multicellular (consist of many cells).
• They contain many different types of cells.• Each type of cell is designed to carry out a
particular job or function.• This is known as CELL SPECIALISM• Not all cells look the same.• Some cells have a special shape and
features to help them do a certain job.
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Sperm cell
• The head contains enzymes which allow it to digest into an egg cell and join with it.
Head contains enzymes & nucleus
Tail
•Designed to Fertilise eggs.
•A sperm is small and has a long tail that provides movement so it can swim and find an egg cell.
•Found in the Testes
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Egg (Ovum) Cell• Designed to be Fertilised.
• Found in the Ovaries.
• An egg cell is large and bulky.
• Contains yolk which provides a large food store for the new cell being formed.
Cytoplasm containing yolk
Layer of jelly
Nucleus
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Palisade Cell
• Designed for Photosynthesis
• Found in the top of a leaf
• Tall and has a large surface area to absorb water and minerals.
• Packed with chloroplasts to help make plant food.
Nucleus
Chloroplasts
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Ciliated Cell
• Designed to stop Lung Damage
• They line all the air passages in the lungs.
• They have tiny hairs called cilia.
• Hairs sweep mucus with trapped dust and bacteria back up the throat.
Nucleus
cilia
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Root Hair Cell• Designed for
absorbing.
•Thin cell wall makes it easy for minerals to pass through.
•Has a large surface which helps it to absorb water and minerals.
•Found in a plant root.
Vacuole
Cell membrane
thin cell wall
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Nerve Cell (neurone)
•They are long •They have connections at each end •Can carry electrical signals •Their job is to carry nerve impulses to different parts of the body.
Nucleus
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Red Blood Cell
•Designed to carry oxygen •Found in blood.•Large surface area, for oxygen to pass through. •Contains haemoglobin, which joins with oxygen.•Has no nucleus
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Questions
1. Why are nerve cells so long?2. Where are egg cells found?3. What is palisade cell specialised to do?4. Why does a root hair cell have a thin wall?5. The hairs in a ciliated cell are known as?6. What is a sperm cell designed to do?7. How are red blood cells different from other
cells?