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1.Identify one similarity and one difference in the structure of plant and animal cells: Similarity: __________________________________________ __________________________________________ Difference: __________________________________________ __________________________________________ 2 marks [Total 2 marks] Specialised Cells Lesson 1
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Specialised Cells Learning outcomes Be able to name some specialised cells Describe the jobs of some specialised cells Describe how specialised cells are adapted for their jobs
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On MWB name the cell
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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 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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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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Model Cell 1.Decide which cell you know the least about. 2.Make a model cell using coloured paper. 3.Make sure you add as many labels as possible.
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Peer assessment 1.Look at the model cell of the person next to you. – Have they included the job of the cell? – Have they included the adaptations of the cell? 2. Write them a www and an ebi
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