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68C Ch.5 Ph.1 T.2

Chapter 5: Greater understanding of Connective Tissues

Function of Connective tissues.. Bind structures, provide support, framework, fill spaces, store fat, protect against infections
Major connective tissue types (3) Fibroblasts, Macrophages, Mast cells
Fibroblast Most common fixed cell in connective tissue. Produce fibers by secreting proteins into extracellular matrix
Macrophages Originate as WBC's, specialized to carry on phagocytosis. Function as scavengers
Mast cells Large, widely distributed. Near blood vessels. Release heparin and histamine
Connective tissue fibers (3) Collagenous, Elastic, Reticular
Collagenous fibers thick threads of protein collagen. Flexible but only slightly elastic. Resist pulling forceHold ligaments and tendons together
Elastic fibers Springlike protein called elastin. Easily stretched or deformed. Yellow fibers
Reticular fibers thin collagenous fibers. Lend delicate support
Areolar tissue delicate, thin membranes throughout body. Binds the skin to underlying organs and fills muscles between
Adipose tissue Fat, lies beneath skin, around kidneys, behind eyeballs, certain abdominal membranes
Dense connective tissue thick, collagenous fibers, fine network of elastic fibers. Very strong, withstand pulling forces. Binds body parts in form of tendons and ligaments
Cartilage rigid connective tissue. Provides support, framework, attachments, protects underlying tissues, forms structural models
Hyaline Cartilage very fine collagenous fibers in extracellular matrix. Found on ends of many bones in joints, soft part of nose
Elastic Cartilage dense network of elastic fibers more flexible than hyaline cartilage, larynx
Fibrocartilage Very tough tissue, shock absorber, forms pads inbetween vertebral disc
Bone most rigid connective tissues, due to mineral salts. Supports body structures
Blood Composed of formed elements suspended in blood plasma. Includes RBC's WBC's and platelets.
Types of epithelial membranes (3) Serous membranes, Mucous, Cutaneous
Skeletal Muscle Tissue Voluntary, long, threadlike cells of skeletal muscle. STRIATIONS
Smooth Muscle Tissue No striations, shorter and spindle shaped
Cardiac Muscle Tissue Striated and branched. Single nucleus, involuntary
Created by: ajwildasin30