The human being body is created of simply four an easy kinds the tissue: nervous, muscular, epithelial, and also connective tissue. Connective organization is the most abundant, commonly distributed, and also varied type. It includes fibrous tissues, fat, cartilage, bone, bone marrow, and also blood. Together the surname implies, connective tissues often bind various other organs together, host organs in place, cushion them, and also fill space.
Connective tissue is differentiated from the other varieties in the the extracellular product (matrix) commonly occupies an ext space 보다 the cell do, and also the cells are relatively far apart. Fat is one exception, having actually cells in close call with each other; but with large, nonliving, intracellular lipid droplets, fat includes much much more nonliving material than life material.
The procession that connective tissue frequently consists of fibers and also a featureless soil substance. The most abundant fiber in connective tissues is a tough protein referred to as collagen. Tendons, ligaments, and the white stringy tissue (fascia) viewed in some cuts the meat space composed nearly entirely that collagen, together is leather, which is composed of the connective organization layer (dermis) of animal skins. Collagen likewise strengthens bone and also cartilage. Elastic and also reticular yarn are much less abundant connective organization proteins v a more minimal distribution.
The ground substance might be liquid, as in blood; gelatinous, together in areolar tissue; rubbery, together in cartilage; or calcified and also stony, together in bone. It consists mainly of water and tiny dissolved ion and organic molecules, yet the gelatinous to rubbery consistency of part tissues outcomes from massive protein-carbohydrate complexes in the soil substance. The tough consistency that bone results mostly from calcium phosphate salt in the ground substance.
some of the cell of connective tissue space fibroblasts (which produce collagen fibers and are the only cell form in tendons and ligaments); adipocytes (fat cells); leukocytes (white blood cells, additionally found external the
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|Connective tissue type and characteristics||attributes||locations|
|Areolar (loose) connective tissue. loosened array of arbitrarily fibers v a wide selection of cell species||Nourishes and cushions epithelia, provides arena for immune defense against infection, binds organs together, allows passage for nerves and also blood ship through other tissues||Under every epithelia; external coverings that blood vessels, nerves, esophagus, and other organs; fascia between muscles; pleural and pericardial bag|
|Adipose tissue (fat). large fat-filled adipocytes and scanty extracellular matrix.||stores energy, conserves human body heat, cushions and also protects countless organs, fills space, shapes body||beneath skin; around kidneys, heart, and also eyes; breast; abdominal muscle membranes (mesenteries)|
|thick irregular connective tissue. Densely spaced, randomly arranged fibers and also fibroblasts.||Toughness; protects organs from injury; provides protective capsules approximately many offal||Dermis the skin; capsules about liver, spleen, and also other organs; fibrous sheath approximately bones|
|Dense continual connective tissue. Densely spaced, parallel collagen fibers and fibroblasts.||binds bones together and also attaches muscle to bone; transfers force from muscle come bone||Tendons and ligaments|
|Cartilage (gristle). extensively spaced cell in little cavities (lacunae); rubbery matrix.||Eases share movements; resists compression in ~ joints; hold airway open; shapes external ear; move vocal cords; forerunner of fetal skeleton; growth zone the children"s skeletal||exterior ear, larynx, rings around trachea, share surfaces and also growth zones of bones, between ribs and also sternum, intervertebral discs|
|Bone (osseous tissue). commonly spaced cells in lacunae; lot of procession in concentric onionlike layers; difficult mineralized matrix.||Physically support body, offers movement, encloses and also protects soft organs, stores and also releases calcium and phosphorus||Skeleton|
|Blood. Erythrocytes, leukocytes, and also platelets in||Transports nutrients, gases, wastes, hormones,||Circulates in cardiovascular system|
bloodstream in fibrous connective tissues); macrophages (large phagocytic cells descended from specific leukocytes); erythrocytes (red blood cells, found only in the blood and bone marrow); chondrocytes (cartilage cells); and osteocytes (bone cells).
The table above lists representative locations and functions of the significant types the connective tissue. More details top top connective tissue can be uncovered in textbooks the histology and human anatomy.
Gartner, Leslie P., and James L. Hiatt. color Textbook the Histology. Philadelphia, PA: W. B. Saunders, Co., 1997.
Ross, Michael H., Lynn J. Romrell, and Gordon I. Kaye. Histology: A Text and also Atlas, 3rd ed. Philadelphia, PA: Lippincott Williams & Wilkins, 1994.
Saladin, Kenneth S. Anatomy & Physiology: The unit of type and Function, second ed. Dubuque, IA: McGraw-Hill greater Education, 2001.