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1. the part of the body to which the head and limbs are attached; called also torso.
2. a larger structure, such as a vessel or nerve, from which smaller divisions or branches arise, or that is created by their union. adj., adj trun´cal.
brachiocephalic trunk truncus brachiocephalicus.
celiac trunk the arterial trunk arising from the abdominal aorta and giving origin to the left gastric, common hepatic, and splenic arteries.
encephalic trunk brainstem.
lumbosacral trunk a trunk formed by union of the lower part of ventral branch of the fourth lumbar nerve with the ventral branch of the fifth lumbar nerve.
lymphatic t's the lymphatic vessels (right or left lumbar, intestinal, right or left bronchomediastinal, right or left subclavian, and right or left jugular trunks) that drain lymph from various regions of the body into the right lymphatic or thoracic duct.
pulmonary trunk a vessel arising from the conus arteriosus of the right ventricle and bifurcating into the right and left pulmonary arteries.
sympathetic trunk two long ganglionated nerve strands, one on each side of the vertebral column, extending from the base of the skull to the coccyx.
A short segment of nerve that includes part of the fourth lumbar spinal nerve (L4) and all of the fifth lumbar spinal nerve (L5). The lumbar trunk combines with axons from the first two sacral spinal nerves (S1 and S2) to form the portion of the sciatic nerve that will become the common peroneal (fibular) nerve.
See also: trunk
1. the main part, as the part of the body to which the head and limbs are attached, or a larger structure (e.g. vessel or nerve) from which smaller divisions or branches arise, or which is created by their union.
2. the extended nose of the elephant, containing many muscles giving it extraordinary strength and mobility. Anatomically it includes the nose and upper lip. There is a single finger-like papilla on the dorsal part of the tip in the Asian elephant and two papillae on the African elephant.
a short artery which is the origin of the common carotid arteries in ungulates.
see Table 9.
the arterial trunk arising from the abdominal aorta and giving origin to the left gastric, common hepatic, and splenic arteries; see Table 9.
a branch of the subclavian artery; see Table 9.
lumbar lymph trunk
a plexus of lymph vessels on the roof of the abdomen; drain into the cisterna chyli.
a nerve trunk formed by union of the ventral branches of the lumbar and sacral nerves; see also Table 9.
see Table 9.
a vessel arising from the conus arteriosus of the right ventricle and bifurcating into the right and left pulmonary arteries; see also Table 9.
see sympathetic trunk.
see dorsal, ventral vagal trunks in Table 14.