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Thick elastic fibers from the visceral pleura (outer lining) of the human lung. Elastic fibers are found in the skin, lungs, arteries, veins, connective tissue proper, elastic cartilage, periodontal ligament, fetal tissue and other tissues which must undergo mechanical stretching. [1] In the lung there are thick and thin elastic fibers. [3]
The dermis is composed of three major types of cells: [3] fibroblasts, macrophages, and mast cells.. Apart from these cells, the dermis is also composed of matrix components such as collagen (which provides strength), elastin (which provides elasticity), and extrafibrillar matrix, an extracellular gel-like substance primarily composed of glycosaminoglycans (most notably hyaluronan ...
Its fibers run in random directions and are mostly collagenous, but elastic and reticular fibers are also present. Areolar tissue is highly variable in appearance. In many serous membranes , it appears as a loose arrangement of collagenous and elastic fibers, scattered cells of various types; abundant ground substance ; numerous blood vessels.
Elastin is made by linking together many small soluble precursor tropoelastin protein molecules (50-70 kDa), to make the final massive, insoluble, durable complex. The unlinked tropoelastin molecules are not normally available in the cell, since they become crosslinked into elastin fibres immediately after their synthesis by the cell and export ...
Types of fibers Tissue Purpose Components Location Collagen fibers: Bind bones and other tissues to each other: Alpha polypeptide chains: tendon, ligament, skin, cornea, cartilage, bone, blood vessels, gut, and intervertebral disc. Elastic fibers: Allow organs like arteries and lungs to recoil: Elastic microfibril and elastin: extracellular ...
Dense connective tissue, also called dense fibrous tissue, is a type of connective tissue with fibers as its main matrix element. [1] The fibers are mainly composed of type I collagen . Crowded between the collagen fibers are rows of fibroblasts , fiber-forming cells, that generate the fibers.
Collagen is the main structural protein found in the body's various connective tissues (skin, bones, tendons, etc.) where it contributes to much of their strength and elasticity. Collagen loss occurs naturally as a part of aging, but can also be influenced by environmental factors such as exposure to ultraviolet light, tobacco , and excessive ...
Human skin pigmentation varies substantially between populations; this has led to the classification of people(s) on the basis of skin colour. [3] In terms of surface area, the skin is the second largest organ in the human body (the inside of the small intestine is 15 to 20 times larger).