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Transcript
What is its job? Found in the testes of animals. A sperm cell is designed to fertilise eggs. What features allow a sperm to complete this job? • It has a long tail that provides movement so it can swim and find an egg cell. • It has lots of mitochondria in its head to produce more energy, for its long journey to the egg cell. • The head contains enzymes which allow it to digest into an egg cell and join with it. What is its job? Cytoplasm containing yolk An egg cell is Found in the Ovaries. designed to be fertilised. What features allow an egg cell to complete this job? • The egg cell is large and bulky •Contains yolk which provides a large food store for the new baby (cell) being formed. Layer of jelly Nucleus •There is a jelly coat to ensure that only one sperm gets through. Found in the Blood. What is its job? Red blood cells are designed to carry oxygen around the blood. What features allow a red blood cell to complete this job? • Has no nucleus, and has a large surface area so it can carry as much oxygen as possible. •Thin outer membrane to let oxygen diffuse through easily. cilia What is its job? They are Designed Found in all the air passages of the lungs. to stop lung damage. What features allow a ciliated cell to complete this job? • The have tiny hairs called cilia • The cilia hairs trap dust and microbes and waft them out of the breathing system Nucleus Nucleus Found in the top of the leaf. What is its job? Their job is to complete photosynthesis. Chloroplast What features allow a root hair cell to complete this job? Tall and has a large surface area to absorb water and minerals. Packed with chloroplasts to help make plant food. Nucleus Found connected to The nervous System. What is its job? Their job is to carry nerve impulses to different parts of the body. What features allow a nerve cell to complete this job? •They are long. •They have connections at each end. •Can carry electrical signals. Nucleus Thin Cell wall Found in a plant root. Cell membrane What is its job? Their job is to absorb water and minerals. What features allow a root hair cell to complete this job? •It has a large surface which helps it to absorb water and minerals. •Thin cell wall makes it easy for minerals to pass through.