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

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 ?
Photomicrograph (H&E) of a transverse section passing through the auditory region at 6.5 cm total body length, showing freely ventral portion columella auris, mesenchymatous pterygoquadrate (P.Q), Meckel's cartilage primordium (M.C.PR) and basal plate (B.P).
The intermandibularis is fan-shaped, with narrow attachments to Meckel's cartilage at its lateral margins and much broader attachments at the midline (Fig.
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.
For example, in the neurocranial cartilage of larvae exposed to 5 x [10.sup.-7] M RA as gastrulae, the ventral elements of all seven arches can be found (Meckel's cartilage in the mandibular arch, the ceratohyal in the hyoid arch, and the ceratobranchials in the branchial arches).
Larvae treated as gastrulae with 5 x [10.sup.-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.
Quadratomandibularis medialis (QMM): small paired digastrics muscle originating in the ventral part of Meckel's cartilage, near the symphysis, surrounds the mandible in anterolateral position to form the corner of the mouth, inserting on the ventral side of the palatoquadrate cartilage.
The aim of the present work was to analyze the effects of valproic acid on embryo/ fetal oral structures: Meckel's cartilage, muscles of the tongue, and submandibular gland.
JD is limited only to the jaw, In some laboratory rodents it has been observed that corticoids induce retrognathia due to inhibition of the growth of Meckel's cartilage (Ten Cate, 1994).