branchial groove


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groove

 [gro̳v]
a narrow, linear hollow or depression.
branchial groove pharyngeal groove.
Harrison's groove a horizontal groove along the lower border of the thorax corresponding to the costal insertion of the diaphragm; seen in advanced rickets in childhood.
medullary groove (neural groove) that formed by the beginning invagination of the neural plate of the embryo to form the neural tube.
pharyngeal groove a groove between a pair of pharyngeal arches in a mammalian embryo, homologous to the branchial cleft of a fish, formed by rupture of the membrane separating a corresponding entodermal pouch and ectodermal groove.

pha·ryn·ge·al grooves

embryonic ectodermal grooves between successive pharyngeal arches.
Synonym(s): branchial groove

branchial groove

n.

branchial, branchiogenic, branchiogenous

pertaining to, or resembling, gills of a fish or derivatives of homologous parts in higher forms.

branchial arches
paired arched columns that bear the gills in lower aquatic vertebrates and which, in embryos of higher vertebrates, become modified into structures of the face, mandible, ear and neck.
branchial clefts
the clefts between the branchial arches of the embryo, formed by rupture of the membrane separating corresponding entodermal pouch and ectodermal groove.
branchial cyst
a cyst formed deep within the neck from an incompletely closed branchial cleft, usually located between the second and third branchial arches. The branchial arches develop during early embryonic life and are separated by four clefts. As the fetus develops, these arches grow to form structures within the head and neck. Two of the arches grow together and enclose the cervical sinus, a cavity in the neck. A branchial cyst may develop within the cervical sinus. Called also branchiogenic or branchiogenous cyst. Seen rarely in dogs as a slowly developing swelling in the pharyngeal area, filled with saliva.
branchial groove
an external furrow lined with ectoderm, occurring in the embryo between two branchial arches.

groove

a narrow, linear hollow or depression. Called also sulcus.

abomasal groove
the third part of the gastric groove. Runs along the inside of the lesser curvature of the abomasum.
alar groove
the slot-like part of the nostril of the dog beneath the wing of the nose; the homologous part in other animals.
atrioventricular groove
see coronary groove (below).
branchial groove
an external furrow lined with ectoderm, occurring in the embryo between two branchial arches.
carpal groove
the bony part of the carpal tunnel on the palmar surfaces of the carpal bones.
coronary groove
indicates, on the external surface of the heart, the demarcation of the atria from the ventricles. Called also atrioventricular groove.
esophageal groove
a superseded name for reticular groove.
gastric groove
in the simple stomach runs along the lesser curvature of the internal surface from the cardia to the pylorus. In the ruminant it is divided into three parts, the reticular, omasal and abomasal grooves.
hoof g's
coronet to sole grooves in ruminant hooves; demarcate horn of wall from horn of heel; the axial groove is a point of weakness and subject to injury.
humerus groove
see intertubercular groove (below).
intermammary groove
median groove which divides the mammary glands into left and right halves.
intertubercular groove
separates the tubercles at the head of the humerus; called also humerus groove.
interventricular groove
there are two of these, right and left, which are external indicators of the separation between the two ventricles. The two grooves do not quite meet at the apex.
jugular groove
the furrow in the ventral part of the neck which accommodates the jugular vein just below the skin.
lacrimal groove
on the nasal surface of the maxillary bone; houses the nasolacrimal duct.
laryngotracheal groove
in fetal development this groove appears in the ventral wall of the pharynx and deepens and separates to form the trachea and lower respiratory tract.
left descending interventricular grooves
see paraconal groove (below).
medullary groove, neural groove
that formed by the invagination of the neural plate of the embryo to form the neural tube.
omasal groove
the middle segment of the gastric groove in the ruminant, between the reticulo-omasal and the omasoabomasal orifices.
optic groove
on the internal surface of the presphenoid bone; occupied by the optic chiasma.
ossification groove
see ossification groove.
paraconal groove
the fat and vessel-filled furrow on the left side of the heart, marking the division between the two ventricles; named from its position beside the conus arteriosus; called also left descending interventricular grooves.
paracuneal groove
deep V-shaped furrows which separate the frog of the equine hoof from the bars and the sole.
rachitic groove
a horizontal groove along the lower border of the thorax corresponding to the costal insertion of the diaphragm; seen in cases of advanced rickets.
groove of Ranvier
see ossification groove.
reticular groove
see reticular groove.
right descending interventricular groove
see subsinuosal groove (below).
ruminoreticular groove
the external demarcation of the division between the reticulum and the rumen.
subsinuosal groove
fat and vessel-filled groove on the right side of the heart, marking the division between the two ventricles; named for its position beneath the sinus venosus; called also right descending interventricular groove.