tissue types

tissue types - Levels of Organization

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Levels of Organization Atom molecule compounds organelles cell tissue organ organ system organism Atom – basic unit of matter H, N, O, C Molecule – atoms joined together H2O, CO2, O3 Compounds – “macromolecules”; inorganic salts and organic molecules NaCl, CaCO3, proteins, carbohydrates, lipids, nucleic acids Organelles – accomplish jobs within the cell Mitochondria, Golgi Apparatus Cell – basic unit of life Tissue – aggregation of similar cells working toward a common function Epithelial–covers; connective–binds, nervous–communication, muscular-locomotion Organ – two or more different kinds of tissues performing a common function Stomach, bladder, liver Organ system – different organs working to common goal 1. Digestive (gastrointestinal) 2. Nervous (brain, spinal cord, nerves) 3. Respiratory (lungs, larynx, nose…) 4. Lymphatic (spleen, liver, lymph nodes) 5. Reproductive (ovary, cervix, fallopian tube) 6. Circulatory (cardiovascular) 7. Endocrine (glands, hormones) 8. Skeletal (bones, ligaments) 9. Muscular (muscles, tendons) 10. Integumentary (skin, nails) 11. Urinary (bladder, kidney) Tissues Epithelial – function in lining and covering A. Characteristics 1. Many cells, little matrix/extra cellular material 2. similar cells that look alike and have similar shapes 3. avascular 4. mitosis 5. attached to the surface via basement membrane B. Cellular Arrangement 1. simple – single cell between free surface 2. stratified – multiple layers thick C. Cell shape 1. Cuboidal – kidney 2. squamos – skin (flattened, pancake-like) 3. columnar – digestive
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Tissue Type Location Function Simple Squamos Lungs, heart chamber lining Readily allows passage of materials; rapid diffusion, filtration, and some secretion in serous membranes Simple Cuboidal Ovary, thyroid, kidney Allows for exchange ; Absorption and secretion Non-ciliated Simple Columnar Microvillus present to enhance absorption and secretion; may contain goblet cells that secrete mucus Ciliated simple columnar Lining of uterine tubes, larger bronchioles of respiratory tract Secretion of mucking, propulsion of mucus along apical surface of
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tissue types - Levels of Organization

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