BIOL 243 Lecture Notes - Lecture 7: Trachea, Stratified Squamous Epithelium, Mesothelium
23 Sep 2016
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Most abundant and widely distributed of primary tissues. 4 main classes: connective tissue proper, cartilage, bone, blood. Loose connective tissue: areolar, adipose, reticular. Matrix: gel-like ground substance; all 3 fiber types: collagen, reticular, elastic. Cells: chondroblasts (found in growing cartilage) and chondrocytes. Matrix: gel-like ground substance; fibers: collagen, elastic in some. Resists compression due to large amounts of water in matrix. Functions to cushion and support body structures. Matrix: gel-like ground substance calcified with inorganic salts; fibers: collagen. Hard tissue that resists both compression and tension. Functions to carry o2, co2, nutrients, wastes, and other substances (ie. hormones) Have mesenchyme (an embryonic tissue) as their common tissue of origin. Have extracellular matrix: connective tissue not composed mainly of cells, largely nonliving ecm separates cells a. i. So can bear weight, withstand tension, endure abuse. Composition and arrangement varies in different types of ct. Unstructured material that fills space between cells: medium through which solutes diffuse between blood capillaries and cells.
