Bone. A ligament is composed of dense bundles of collagenous fibers and spindle-shaped cells known as fibrocytes, with little ground substance. Elastic fibers allow connective tissue to stretch and recoil. Among the collagen fibers there is a network of elastic fibers as well, to limit the distensibility of the tissue. Elastic cartilage is springy, yellow, and elastic and is found in the internal support of the external ear and in the epiglottis. The elastic fibers may be isolated, but are more often arranged in sheets as distinct laminae or layers (internal and external elastic lamina) or as fenestrated lamellae in the walls of elastic arteries. Bone c. Tendon d. Intervertebral disc e. Myometrium. AB alveolar bone; Ab ameloblasts; GE gingival epithelium; PL periodontal ligament; PS periodontal space; V vessel; * electron-dense core; arrowhead microfibril. So, how our muscles attached to bone? This is composed of elastic and collagen fibers. Elastic fibers contain the protein elastin, which co-polymerizes with the protein fibrillin. d. Which connective tissue cell type contains properties of smooth muscle cells? Collagen fibers are also found in connective tissue. Elastic fibers (or yellow fibers) are bundles of proteins found in extracellular matrix [1] of connective tissue and produced by fibroblasts and smooth muscle cells in arteries.These fibers can stretch up to 1.5 times their length, and snap back to their original length when relaxed. Decalcified bone matrix. Elastic fibres are bundles of proteins (elastin) found in extracellular matrix of connective tissue and produced by fibroblasts and smooth muscle cells in arteries. Dense, regular, elastic tissue characterizes ligaments. The organic matrix is materially similar to other connective tissues, including some amount of collagen and elastic fibers. Elastin provides both strength and movement. In hyaline cartilage, type II collagen makes up 40% of its dry weight. This is older elastic cartilage with few elastic fibers. It is less likely than hyaline cartilage to undergo regressive changes such as calcification. Reticular proteins are extensively branched short fibers mainly found in organs that have lots of mesh-like internal structure. The positive controls for elastic fiber staining were the arterial wall elastic laminae included in the temporal bone materials. Scale bars = 50 μm for the inset in figures a, c, e; Scale bars = 100 nm for a–h. Elastic connective tissue is composed primarily of elastic fibers that are irregularly arranged and yellowish in color (fig. Figure 8: Elastic cartilage Bone. Elastic fibers provide flexibility to the tissues. Elastic cartilage also contains elastic fibers, and fibrocartilage contains more collagen than hyaline cartilage. • Fibrocartilage (bundles of collagen, rows of chondrocytes, no perichondrium) o Function—resist compressive forces, absorb shock o Location—Intervertebral disk (IVD), pubic symphysis, meniscus of knee Strongest and toughest cartilage.Lacuna containing chondrocyte. Elastin makes tissues elastic, so that the tissue will recoil after stretch. Elastic fibres are 5 times more extensible than an elastic band! They are composed of elastin - a protein that is flexible and allows many tissues in the body to resume their shape after stretching or contracting and are not visualized by an H&E. Severe heritable elastic fibre diseases are caused by mutations in elastic fibre components; for example, mutations in elastin cause supravalvular aortic stenosis and autosomal dominant cutis laxa, mutations in fibrillin-1 cause Marfan syndrome and Weill–Marchesani syndrome, and mutations in fibulins-4 and -5 cause autosomal recessive cutis laxa. Bone is a hard, inflexible tissue that is specialized to resist compression. The fibers in the cartilage connective tissue include collagen and elastic fibers. Elastin protein has little structure and individual proteins are crosslinked into a network. This fiber consists of thin strands of collagen that form a network of fibers to support the tissue and other organs to which it is connected. Fibrous cartilage has many collagen fibers and is found in the intervertebral discs and pubic symphysis. Although previous studies failed to demonstrate elastic fibers in intervertebral discs, electron microscopy of twenty human intervertebral discs obtained at autopsy and operation revealed characteristic elastic fibers in both the annulus fibrosus and the nucleus pulposus. Elastin is the main functional component of elastic fibers. The gingival lamina propria (Lp) includes an elastic fiber system comprising oxytalan, elaunin and elastic fibers. Elastic cartilage shows little extracellular matrix containing highly amount of branched elastic fibers that may account for 20 % of the dry weight and contribute to the mechanical properties of the tissue. These fibers are often organized into lamellar sheets, as in the walls of arteries. Key Terms. Mixing up collagen (less extensible) and elastin, prevents overstretch. Cartilage connective tissue has limited ground substance and can range from semisolid to a flexible matrix. A) collagen, elastic fibers, and other proteins B) osteoblasts and osteoclasts C) collagen, proteins and hydroxyapatite D) sodium, calcium, phosphorus, elastic fibers and some adipose tissue Type II collagen is the most abundant collagen. a. Collagen fiber b. Elastic fiber c. Reticular fiber d. Purkinje fiber e. All of the above are fibers found in connective tissue. a. Red/Orange b. Pink/red c. Purple/Red d. Blue/black e. Green/blue. This type of tissue supports muscle tissue, nerve tissue and epithelial tissue. These fibers can stretch up to 1.5 times their length, and snap back to their original length when relaxed. Which of the following choices is NOT correct? The severe skeletal abnormalities associated with Marfan syndrome (MFS) and congenital contractural arachnodactyly (CCA) underscore the notion that fibrillin assemblies (microfibrils and elastic fibers) play a critical role in bone formation and function in spite of representing a low abundance component of skeletal matrices. The main property of elastin is that after being stretched or compressed, it will return to its original shape. 7. Since bone is a connective tissue, it has all the necessary features of a connective tissue including a matrix. Ground substance is amorphous and gel-like in texture that surrounds cells. Collagen fibers, along with keratin, make the skin strong and waterproof. Elastin fibers are prominent fibers in elastic tissues found in skin and the elastic ligaments of the vertebral column. Reticular fibers are the third type of protein fiber found in connective tissues. It contains molecules such as proteoglycans and adhesive glycoproteins, and like collagen fibers are produced by fibroblasts. Contents Highlights. The elasticity of the bone can be determined using a strain gauge instrument that records the very small strain felt by the bone due to applied stress. Elastic fibers are located in the skin and walls of blood vessels. Elastic fibers include elastin, elaunin and oxytalan.. Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. They are made mainly from bundles of elastin proteins. Elastic fibers allow the resilient rebound of the stretched vessel wall while collagen fibers provide tensile strength to the vessel wall. e. Which of the following is NOT a fiber found in connective tissue? The answer is that the muscle fibers recede into a strip of fibrous tissue. a. Fixation b. Embedding in paraffin c. Staining d. Slicing e. Dehydration. Reticular fibers are very fine threads and, unlike elastic fibers but like collagenous fibers, contain collagen (but of a different microfibril protein type to collagenous fibers). Elastic cartilage, sometimes referred to as yellow fibrocartilage, is a type of cartilage that provides both strength and elasticity to certain parts of the body, such as the ears.. The muscle tendons were composed of an outer thin layer of collagen fibers and an inner thick core of elastic fibers near the malleus or stapes. Elastic fibers are stretchable because they are normally disorganized – stretching these fibers makes them take on an organized structure. The Journal of Bone & Joint Surgery: January 1976 - Volume 58 - Issue 1 - p 73-76. Elastic cartilage does not arise from chondrogenic centers, but directly from mesenchymal tissue. Elastic fibres are made up of elastin and microfibrils which are made up of a mixture of elastin and glycoproteins, including fibrillin. Hence, reticular fibers are abundant in spleen and lymphoid organs. Bone is another type of supporting connective tissue. What makes up the matrix of a bone? 1-11). The elastic fibers were inserted deeply into the type II collagen‐poor fibrocartilage covering the ear ossicles. Solution for 7. In the embryo, bone begins as hyaline cartilage and later ossifies. The higher amount of minerals will make the bone less elastic and more rigid. 6. It consists of fiber bundles that appear dark under the microscope and has many disc-shaped cells interspersed throughout that are white in color. A. Elastic cartilage has elastic fibers in the matrix B. Elastic cartilage is found in the walls… An elastic fiber will stretch to around one and a half times its relaxed length. Fibers: Cartilage is composed of collagen and elastic fibers. Now this muscle, ending a strip attaches to the bone, securing It., now when the muscle contracts, it will cause movements due to the lever action. The elasticity of the bone depends on the proportion of collagen fibers in the bone. Elastic fibers in between Chondrocytes. The matrix is calcified because of the mineral deposition, as a … The walls of large arteries contain high concentrations of elastin fibers that allow them to stretch during systole and contract during diastole. Bone, or osseous tissue, is a connective tissue that has a large amount of two different types of matrix material. This gives strength and flexibility to the tissue. Bone - Bone - Chemical composition and physical properties: Depending upon species, age, and type of bone, bone cells represent up to 15 percent of the volume of bone; in mature bone in most higher animals, they usually represent only up to 5 percent. Current research on elastic fibres aims to define how cells and their integrin and heparan sulphate proteoglycans (HSPG) receptors direct the assembly of microfibrils and elastic fibres, how fibronectin and the ADAMTS and ADAMTSL molecules influence microfibril deposition and how pericellular processing (by furin/PACE enzymes) and cross-linking (by LOX and tissue … During the preparation of a routine H&E slide, what step occurs after the tissue is preserved? They can be stretched to one and a half times their original lengths and will snap back to their former size. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column. BONE Bone is a special form of connective tissue & consists of cells, fibers and extracellular matrix. Ligament, tough fibrous band of connective tissue that serves to support the internal organs and hold bones together in proper articulation at the joints. Elastic fibers … 5. 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