Types of Cells PDF

Types of Cells Two main classes of cells • Prokaryotes = no nucleus (bacteria) • Eukaryotes = nucleus (animals, plants, fungi) Differences ? Bacterium Animal cell atoms molecules organelles cells Human eye > 0.2 mm 1 mm cm 50 m Light microscope 2 m > 0.2 m Electron microscope...

Types of Cells Two main classes of cells • Prokaryotes = no nucleus (bacteria) • Eukaryotes = nucleus (animals, plants, fungi) Differences ? Bacterium Animal cell atoms molecules organelles cells Human eye > 0.2 mm 1 mm cm 50 m Light microscope 2 m > 0.2 m Electron microscope > 0.2 nm Cell types, size and shape More than 200 cell types identified in human body Epithelial cells fibroblast Specialised cell types: rod cell hair cell muscle sperm neuron red blood cells corpuscles Cells that cover/line body organs Epithelial Cells Cells that connect body parts Fibroblasts Cells that move organs & body parts Muscle Cells Cells that store nutrients Fat Cells Cells that fight disease Blood cells Cells that receive/transmit information Neurons Cells of reproduction Sperm & Ovum Cells to Tissues to Organs O2 Food Digestive system Takes in food, breaks it down, release nutrients, and eliminates unabsorbed matter (feces) CO2 Cardiovascular system Via the blood, distributes oxygen and nutrients to all body cells and delivers wastes and carbon dioxide to disposal organs Blood Respiratory system Takes in oxygen and eliminates carbon dioxide CO2 O2 Heart Nutrients Interstitial fluid Integumentary system Protects the body as a whole from the external environment, .. Urinary system Eliminates nitrogenous wastes and excess ions Nutrients and wastes pass between blood and cells via the interstitial fluid Feces Urine