specialised Cells

Animal cells Epithelial cell Nerve cell Function Function The function of a Epithelial cell is to cover the outer surface of the body, line cavities and protect surfaces of organs. Used in absorption and excretion of substances, or water-proofing. Function Transmit electrical signals around the body. Structure Very long, thread-like cells. How is it specialised? The long cells make up nerve fibres, which join senses organs, e. g. touch sense organs in the hand , to the brain. Structure The Structure of a Epithelial cell is small, fit well together and can have hair-like structures called cilia coming from them. How is it specialised? The cilia provide a large surface area ideal for lining the gut, to help absorption or excretion. They may also secrete liquids to help lubricate surfaces.

How is it adapted to the function? How is it adapted to the function? Sperm cell Red blood cell Function Fertilises egg, enabling information to be transferred from one generation to the next. Function Carry oxygen around the body Structure Biconcave ( a dip in the middle of each side) Structure Looks like a microscopic tadpole. Contains generic information from the father. Red blood cell How is it adapted to the function? Shape increases their surface area, which helps them absorb oxygen. Bendiness helps them to pass down thin capillary blood vessels. How is it adapted to the function? The tail allows it to swim about. Has a special coating on its head, used to digest its way into an egg. Sperm cell

How is it adapted to the function? How is it adapted to the function Plant cells Root hair cell Pollen cell Function Absorb water and minerals from the soil Function Fertilization of the egg cell. Contains generic information. Structure Long and thin with large surface area. Structure Small and light How is it adapted to the function? Long, thin structure provides a large surface area to help absorption of water and minerals. Don’t contain chlorophyll as they are usually underground, so can’t photosynthesis. How is it adapted to the function The pollen cell and ovule join to make a new and unique plant. This allows generic information to be transferred from one generation to the next.

How is it adapted to the function Palisade cell Function Photosynthesis Structure Transparent regularly shaped cells with chloroplasts. How is it adapted to the function Sunlight passes through the cell to the chlorophyll. Chlorophyll changes water and carbon dioxide into food.

By: Alicia Stephanie Siekierski The End By: Alicia Stephanie Siekierski