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Connective Tissue
| Term | Definition |
|---|---|
| connective tissue is? | most abundant and widely distributed in the human body |
| typical cells? | fibroblasts, macrophages, mastcells |
| Except for what? connective tissue has a nerve supply | cartilage |
| highly what? | vascular;except cartilage (Avascular) |
| intercellular matrix? | may be fluid, semifluid, gelatinous, fibrous or solid. -- determines tissues qualities |
| connective tissue cells can usually what? | divide |
| 3 types of fibers | elastic collagen reticular |
| functions? | 1.binding, attachment and support (bones, tendons and ligaments, organs) 2.protections- bones and adipose tissue 3.insulation- adipose tissue 4.storage-of energy and fat soluble substances 5.transportation-food |
| Loose Connective Tissue or Areolar Connective Tissue | loosely arranged, found wrapping organs and under skin, holds and conveys tissue fluid. -- contains *fibroblasts*, but also macrophages, adipocytes and some blood cells. It contains all three fiber types, randomly arranged. |
| Adipose Tissue | cells are adipocytes, and specialized in storing fat. Adipocytes are tightly packer and very little matrix. -- accumulate under the skin and yellow marrow of long bones. Functions in energy reserves, insulation, protections and support. |
| Reticular Connective Tissue | consists of reticular fibers and fibroblasts and forms the supporting framework for cells in the liver, spleen, lymph nodes and bone marrow. |
| Dense Reg. Connective Tissue | collagen fibers are arranged in parallel bundles which makes this tissue flexible, but resistant to stretching. Fibroblasts are found in rows btwn the fibers. Found in tendons and ligaments. Blood supply is POOR! |
| Elastic Connective Tissue | consists of elastic fibers and fibroblasts. Very elastic. It is found in the heart and the vocal cords. |
| Specialized Connective Tissues | Cartilage has a dense network of collagen fibers, which gives strength, and elastic fibers. -cells are chondrocytes & are found in lacunae (spaces) -no blood supply in cartilage itself |
| Hyaline Cartilage-(gristle) most abundant cartilage, & weakest | -very fine collagen fibers and a resilient gel as its ground substance -found in: embryonic skeleton, reduced frictions, absorbs shock, provides support. -important in bone growth and repair |
| Elastic Cartilage | Has cartilage in a network of elastic fibers. It maintains the shape of organs such as the epiglottus of the larynx, auditory tubes, and external ears. |
| Fibrocartilage | Contains visible bundles of collagen fibers and combines strengths and rigidity. Also acts as a shock absorber. It is found in th epubic symphysis, intervertebral discs, and menisci in joints -STRONGEST CARTILAGE! |
| Bones(Osseous Tissue) | Collagen fibers (flexibility), mineral salts (hardness) and cells called osteocytes, Basic unit: Oasteon or Haverslan system -supports, protects, provide movements, store mineral, and house blood-forming tissue |
| Blood(Vascular Tissue) | consists of plasma and formed elements (cells) -transport oxygen and carbon dioxide, carry on phagocytosis, participate in allergic reactions , provide immunity, and bring about blood clotting. -erythrocytes, leukocytes, thrombocytes |
Created by:
bdcruise