BIOL355 Lecture Notes - Lecture 18: Loose Connective Tissue, Arterial Stiffness, Ultimate Tensile Strength
3 Feb 2016
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Premise: w/ age, formation of new cross-links b/w or within any macromolecules (proteins, dna, lipids) Lead to altered structure and function (s-shaped protein -> c-shaped) Tissues: aggregation of similar cells that perform specific. Organs: a structure composed of two or more tissues to perform functions specific function. Systems: a group of organs that function together. 4 tissue types: connective (matrix+fibers+living cells); found throughout the body, most abundant tissue by weight, functions of binding, supporting framework, protection against infection, repairing tissue damage) Engulf and destroy foreign cells contain lysosomes important defense against infection. Immune allergic reactions fat (adipose) cells store fat energy insulation. Produce fibers and matrix material star shaped. Offers elasticity to structures (e. g. blood vessel) composed of the protein elastin less strength than collagen thinner, elastic -> able to stretch recoil (e. g. lungs, skin and arteries) Holds structure together composed of the protein collagen tough, flexible, high tensile strength resists stretching tendons, ligaments and dermis of skin.
