Meckel's cartilage


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Related to Meckel's cartilage: Meckel's diverticulum, Reichert's cartilage

cartilage

 [kahr´tĭ-lij]
a specialized, fibrous connective tissue present in adults, and forming most of the temporary skeleton in the embryo, providing a model in which most of the bones develop, and constituting an important part of the organism's growth mechanism; the three most important types are hyaline cartilage, elastic cartilage, and fibrocartilage. Also, a general term for a mass of such tissue in a particular site in the body.
 Involvement of joint and cartilage in osteoarthritis. From ARHP Arthritis Teaching Slide Collection, American College of Rheumatology.
alar c's the cartilages of the wings of the nose.
aortic cartilage the second costal cartilage on the right side.
arthrodial cartilage (articular cartilage) that lining the articular surfaces of synovial joints.
arytenoid c's two pyramid-shaped cartilages of the larynx.
connecting cartilage that connecting the surfaces of an immovable joint.
costal cartilage a bar of hyaline cartilage that attaches a rib to the sternum in the case of true ribs, or to the immediately above rib in the case of the upper false ribs.
cricoid cartilage a ringlike cartilage forming the lower and back part of the larynx.
diarthrodial cartilage articular cartilage.
elastic cartilage cartilage that is more opaque, flexible, and elastic than hyaline cartilage, and is further distinguished by its yellow color. The ground substance is penetrated in all directions by frequently branching fibers that give all of the reactions for elastin.
ensiform cartilage xiphoid process.
fibrous cartilage fibrocartilage.
floating cartilage a detached portion of semilunar cartilage in the knee joint.
hyaline cartilage flexible, somewhat elastic, semitransparent cartilage with an opalescent bluish tint, composed of a basophilic fibril-containing substance with cavities in which the chondrocytes occur.
 Hyaline cartilage. The matrix nearest the chondrocytes is intensely staining; although the matrix appears homogeneous, collagen fibrils may be visualized by polarized light or electron microscopy. From Dorland's, 2000.
Meckel's cartilage the ventral cartilage of the first branchial arch.
permanent cartilage cartilage that does not normally become ossified.
Reichert's cartilage the dorsal cartilage of the second branchial arch.
reticular cartilage elastic cartilage.
semilunar cartilage one of the two interarticular cartilages of the knee joint.
temporary cartilage cartilage that is normally destined to be replaced by bone.
thyroid cartilage the shield-shaped cartilage of the larynx, underlying the laryngeal prominence on the surface of the neck.
vomeronasal cartilage either of the two narrow strips of cartilage, one on each side, of the nasal septum supporting the vomeronasal organ.
yellow cartilage elastic cartilage.

Meckel's cartilage

[mek′elz]
Etymology: Johann Friedrich Meckel, German anatomist, 1781-1833
a cartilaginous bar in the embryo. From it or its sheath, the sphenomandibular ligament, the malleus, and the incus develop. Also called Meckel's rod.

Meckel's cartilage

A cartilaginous bar about which the mandible develops.

Meckel's cartilage

one of a pair of cartilages forming the lower jaw of cartilaginous fishes such as sharks and skates. In fish, reptiles and birds it forms the ossified articular bone and in mammals, the MALLEUS.
References in periodicals archive ?
The remainder of the palatoquadrate and Meckel's cartilage divided into smaller bones.
Meckel's cartilage grows back to meet a primary jaw joint and becomes enveloped by intramembranous bone.
RAI 2 Partial deletions and distortions of midbrain/ hindbrain border region (MB/HB); eyes slightly closer together; axis slightly truncated; heart smaller with pericardial edema, otocysts slightly closer to MB/HB; tail slightly curled; deletions of the quadrate, pterygoid, and hyosymplectic cartilage; malformations of Meckel's cartilage, ceratohyals and the basihyal.
7] M RA show deletions of one pair of ceratobrachials, whereas the ceratohyals in the hyoid arch and, in many cases, Meckel's cartilage in the mandibular arch remain.
In the mandibular arch, for example, the quadrate and Meckel's cartilage both arise from a single precartilage condensation, with the quadrate forming before Meckel's cartilage (Schilling and Kimmel, 1997).
The Meckel's cartilage of VPA treated fetuses was rudimentary, with small chondrocytes with smaller nuclei.
VPA probably has a direct effect on the organization of the cartilaginous tissue of Meckel's cartilage, resulting in delayed differentiation, as observed in this work, with a reduction in the collagenous concentration and a decrease in the synthesis of proteoglycans (Aulthouse & Daron, 1994).