1. 1. Tissues provide for a division of labor among body cells. Cells carry out all the chemical activities needed to sustain life. AVIGEL D. BACTASA1
2. 2. Mitosis Cytoplasmic Division Interphase Differentiation C e l l u l a r B a s i s o f L i f e AVIGEL D. BACTASA 2
3. 3. Cells vary greatly in SIZE and STRUCTURE. Cells have two main parts - NUCLEUS & CYTOPLASM Enclosed in a CELL MEMBRANE (also called PLASMA MEMBRANE) C e l l u l a r B a s i s o f L i f e AVIGEL D. BACTASA 3
4. 4. C e l l u l a r B a s i s o f L i f e ENDOPLASMIC RETICULUM Rough Smooth GOLGI APPARATUS MITOCHONDRIA LYSOSOMES MICROFILAMENTS MICROTUBULES NUCLEUS NUCLEOLUS CHROMATIN VESICLES CENTROSOME AVIGEL D. BACTASA 4
5. 5. There are 4 major types of tissue: A. Epithelial B. Connective C. Muscle D. Nervous C e l l u l a r B a s i s o f L i f e AVIGEL D. BACTASA 5
6. 6. C e l l u l a r B a s i s o f L i f e AVIGEL D. BACTASA 6 General Characteristics: Found throughout the body, covers all body surfaces both inside and out. Main glandular tissue. Attached to underlying connective tissue by noncellular nonliving basement membrane. Usually has no vascular tissue - blood supply Cells reproduce rapidly (rapid healing). Cells tightly packed together
7. 7. C e l l u l a r B a s i s o f L i f e AVIGEL D. BACTASA 7 General Characteristics: Most abundant tissue in your body, found throughout Binds structures together Provides support, protection, framework, fills space, stores fat, produces blood cells, fights infection, and helps repair tissue. Composed of more scattered cells with abundant intercellular material ' matrix Made up of a ground substance (fluid, semi-solid) and fibers Most has a good blood supply Cells can reproduce
8. 8. C e l l u l a r B a s i s o f L i f e AVIGEL D. BACTASA 8 A. Skeletal - skeletal muscles B. Smooth - in hollow organs, stomach C. Cardiac - wall of the heart
9. 9. C e l l u l a r B a s i s o f L i f e AVIGEL D. BACTASA 9 Found in brain, spinal cord, nerves A. Neurons - transmit signals B. Neuroglia - protection, support
10. 10. CELLS Cells are too small to be seen without magnification. There are two primary types of cells. Prokaryotic single-celled organisms were the earliest and most primitive There are more bacterial cells in the body than human cells. Cells contain genetic material. TISSUES Muscle tissue is three times more efficient at burning calories than fat. For every pound of fat gained, you add seven miles of new blood vessels. There are more than 600 individual skeletal muscles and 206 bones in your body. You are taller in the morning than in the evening. Your stomach manufactures a new lining every three days to avoid digesting itself. AVIGEL D. BACTASA 10 C e l l u l a r B a s i s o f L i f e
11. 11. AVIGEL D. BACTASA 11 C e l l u l a r B a s i s o f L i f e