lacrimal groove(redirected from sulcus lacrimalis)
the groove in the nasal surface of the maxilla that, together with the lacrimal bone, forms the fossa for the lacrimal sac.
Synonym(s): sulcus lacrimalis [TA]
a groove formed by the lacrimal bone and the frontal process of the maxilla that contains the lacrimal sac.
A vertical groove along the upper front edge of the medial wall of the orbit. The groove, formed by matching furrows on the maxillary and lacrimal bones, holds the lacrimal sac and leads into the lacrimal canal.
See also: groove
a narrow, linear hollow or depression. Called also sulcus.
the third part of the gastric groove. Runs along the inside of the lesser curvature of the abomasum.
the slot-like part of the nostril of the dog beneath the wing of the nose; the homologous part in other animals.
see coronary groove (below).
an external furrow lined with ectoderm, occurring in the embryo between two branchial arches.
the bony part of the carpal tunnel on the palmar surfaces of the carpal bones.
indicates, on the external surface of the heart, the demarcation of the atria from the ventricles. Called also atrioventricular groove.
a superseded name for reticular groove.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.
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.
see intertubercular groove (below).
median groove which divides the mammary glands into left and right halves.
separates the tubercles at the head of the humerus; called also humerus 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.
the furrow in the ventral part of the neck which accommodates the jugular vein just below the skin.
on the nasal surface of the maxillary bone; houses the nasolacrimal duct.
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.
the middle segment of the gastric groove in the ruminant, between the reticulo-omasal and the omasoabomasal orifices.
on the internal surface of the presphenoid bone; occupied by the optic chiasma.
see ossification 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.
deep V-shaped furrows which separate the frog of the equine hoof from the bars and the sole.
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.
see reticular groove.
right descending interventricular groove
see subsinuosal groove (below).
the external demarcation of the division between the reticulum and the rumen.
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.