* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Cell Notes - My Teacher Pages
Survey
Document related concepts
Cell nucleus wikipedia , lookup
Endomembrane system wikipedia , lookup
Extracellular matrix wikipedia , lookup
Tissue engineering wikipedia , lookup
Programmed cell death wikipedia , lookup
Cytokinesis wikipedia , lookup
Cell growth wikipedia , lookup
Cell encapsulation wikipedia , lookup
Cellular differentiation wikipedia , lookup
Cell culture wikipedia , lookup
Organ-on-a-chip wikipedia , lookup
Transcript
Why Study Cell Biology? “…For every living organism is, or at some time has been, a cell.” E.B. Wilson, 1925 Cells are Us A person contains about 100 trillion cells. That’s 100,000,000,000,000 or 1 x 1014 cells. There are about 1,000 different cell types in humans Cells are tiny, measuring on average about 0.002 cm (20 um) across. That’s about 1250 cells per inch. Red and white blood cells nerve cell How big are cells? • Bacteria e.g. Eschericia coli (aka E.coli) • Size=1 µm by 3 µm (one millionth of meter!) • Human red blood cell = 8 µm Largest cell = yolk of an ostrich egg The Cell Theory (1838-1839)** All organisms are composed of one or more cells. Cells are the smallest living things. Schleiden Cells arise only by division of previously existing cells. http://www.youtube.com/watch?v=gEwzDydciWc&feature=related Schwann All cells today came from an original cell…. Bacteria on the Head of a Pin Animal Cell The Nucleus Think of the nucleus as the cell’s control center. Two meters of human DNA fits into a nucleus that’s 0.000005 meters across. The Lysosome Functions: •Digesting food or cellular invaders •Recycling cellular parts The Mitochondrion Energy!! Mitochondria and Health Plant Structures The Chloroplast The Solar Panel of the Plant Cell! Two Other Unique Features of Plant Cells The central vacuole may occupy 90% of a plant cell. Cell Walls = Great Strength Cytoplasm The Cytoplasm in Action A white blood cell using the cytoplasm to grab a bacterium. How do cells move?** • Flagella • Cilia • False feet http://www.youtube.com/watch?v=_k78AWnDaqA http://www.youtube.com/watch?v=7pR7TNzJ_pA&feature=related • http://www.youtube.com/watch?v=KxTYy NEbVU4&feature=related Cell movement Two Different Types of Cells** Prokaryotic cell A eukaryotic cell Us vs. Them Eukaryotes and Prokaryotes Eukaryotes Prokaryotes Amoeba Zombie Cells