lacrimal groove

lacrimal groove,

a groove formed by the lacrimal bone and the frontal process of the maxilla that contains the lacrimal sac.

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groove

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

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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a superseded name for reticular groove.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.