Connective Tissue.docx - Connective Tissue Basic 1 2 3 components of connective tissue Specialized cells Extracellular protein fibers fluid called

Connective Tissue.docx - Connective Tissue Basic 1 2 3...

This preview shows page 1 - 3 out of 8 pages.

Connective Tissue: Basic components of connective tissue: 1. Specialized cells 2. Extracellular protein fibers 3. fluid called Ground substance o Extracellular protein fibers + ground substance = make up the matrix o The matrix accounts for most of the volume of connective tissue Unlike how cells make up most of the epithelial cells Specific functions: (6) Establishing a structural framework for the body Transporting fluids and dissolved materials Protecting delicate organs Supporting, surrounding, and interconnecting other types of tissue Storing energy reserves, especially in the form of triglycerides Defending the body from invading microorganisms 3 ways of classifying connective tissue: Connective tissue proper; o Loose o Dense o Elastic Fluid connective tissue: o Blood o lymph Supporting connective tissue: o Bone o Cartilage Connective tissue proper: Includes those tissues with many types of cells and extracellular fibers They connect and protect Types of cell populations: Fibroblasts: Always present in connective tissue proper Secrete hyaluronan and proteins (which assemble to form large extracellular fibers Extracellular fluid + hyaluronan + Adipocytes: Aka fat cells Contains a larger liquid droplet Nucleus and organelles are squeezed to one side (look like ring) Numbers vary among types of CT
proteins = proteoglycans which make ground substance viscous Fibrocytes: 2nd most abundant cell in proper Spindle shaped cells maintain the Connective Tissue fibers of proper Mesenchymal cells: Stem cells that are present in many connective tissues Respond to local injury or infections o By dividing to produce daughter cells that differentiate into fibroblasts, macrophages and other CT cells Melanocytes: Synthesize and store brown pigment (melanin) Common in the epithelium of the skin where they play a role in determining the colour of skin Also abundant in connective tissue of the eye and dermis of the skin Mast cells: Circulate in the blood in an immature form before they migrate to other vascularized tissues (tissues with blood vessels) and undergo final maturation The cytoplasm of a mast cell is filled with granules containing histamine and heparin Histamine is released after an injury and stimulates local inflammation. You take antihistamines to reduce cold symptoms Lymphocytes: Migrate throughout the body, travels through connective tissues n other tissues Increase when tissue damage occurs May develop into plasma cells (they produce antibodies Microphages: Phagocytic blood cells that move through connective tissues in small numbers Attracted to the site of an infection or injury when chemicals are released by macrophages and mast cells Macrophages: Large phagocytic cells Scattered throughout matrix

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture