Cells[1]

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Cells[1]

  1. 1. Cells The basic structural and functional units of all organisms. They may exist and function alone or in groups. The two cell types are somatic and germ. See mitosis.
  2. 2. Kind of cells • Prokaryotic: those cells are smaller and simpler than a eukaryote, they have a similar form but the nucleos and organelles are simpler. There are two kind of prokaryotic: 1. Bacteria 2. Archea • Eukaryotic: there are four kind of eukaryotic 1. Protist 2. Fungi 3.Plants 4. Animals
  3. 3. Animal cells • Animal cells have: 1. Nucleus 2. Cytoplasm 3. Cell membrane 4. Mitochondria 5. Ribosomes
  4. 4. Plant cells The plant cells also have extra parts: 1. Cell wall 2. Cloroplast 3. Permanent vacuole
  5. 5. Leavs cells • Function: light energy for photosynthesis • Adaption: Packed with chloroplasts. closely packed cells form a continuous layer.
  6. 6. Root air cell • Function: Absorbs water and mineral ions. • Adaption: Long 'finger-like' process with very thin wall.
  7. 7. Sperm cells • Function: Fertilises an egg cell - female gamete • Adaption: genetic information and an enzyme to help penetrate. The middle section with mitochondria for energy. The tail moves the sperm to the egg.
  8. 8. Red blood cells • Function: haemoglobin to carry oxygen to the cells. • Adaption: outer membrane. increases the surface area to allow more oxygen. No nucleus.
  9. 9. Diffusion • From high concentration to a region where they are in low concentration • to move from a high to a low concentration while there is a concentration gradient. • For exemple the oxigen in the blood.
  10. 10. Osmosi • For osmosis to happen you need: 1. Two solutio with different concentration 2. A partially permeable membrane to separate them • Moviment of wather from a less concentration solution to a more concentration solution through a membrane • Very important for plants

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