Torso

Torso
Grays Anatomy image1219.gif
Human male torso
Details
Identifiers
Latintruncus
MeSHD060726
TA98A01.1.00.013
A14.1.09.244
A14.2.03.003
TA2124
FMA7181
Anatomical terminology

The torso or trunk is an anatomical term for the central part, or the core, of the body of many animals (including humans), from which the head, neck, limbs, tail and other appendages extend. The tetrapod torso — including that of a human — is usually divided into the thoracic segment (also known as the upper torso, where the forelimbs extend), the abdominal segment (also known as the "mid-section" or "midriff"), and the pelvic and perineal segments (sometimes known together with the abdomen as the lower torso, where the hindlimbs extend).[1]

Anatomy

Major organs

Surface projections of major organs of the torso, using the vertebral column and rib cage as main reference sources.

In humans, most critical organs, with the notable exception of the brain, are housed within the torso. In the upper chest, the heart and lungs are protected by the rib cage, and the abdomen contains most of the organs responsible for digestion: the stomach, which breaks down partially digested food via gastric acid; the liver, which respectively produces bile necessary for digestion; the large and small intestines, which extract nutrients from food; the anus, from which fecal wastes are egested; the rectum, which stores feces; the gallbladder, which stores and concentrates bile; the kidneys, which produce urine, the ureters, which pass it to the bladder for storage; and the urethra, which excretes urine and in a male passes sperm through the seminal vesicles. Finally, the pelvic region houses both the male and female reproductive organs.

Major muscle groups

The torso also harbours many of the main groups of muscles in the body, including the:

  • Pectoral muscles
  • Abdominal muscles
  • Lateral muscle
  • Epaxial muscles

Nerve supply

The organs, muscles, and other contents of the torso are supplied by nerves, which mainly originate as nerve roots from the thoracic and lumbar parts of the spinal cord. Some organs also receive a nerve supply from the vagus nerve. The sensation to the skin is provided by:

  • Lateral cutaneous branches
  • Dorsal cutaneous branches

See also

  • Belly cast
  • Waist
  • Belvedere Torso

References

Media files used on this page

Wiktionary-logo-en-v2.svg
Author/Creator: Dan Polansky based on work currently attributed to Wikimedia Foundation but originally created by Smurrayinchester, Licence: CC BY-SA 4.0
A logo derived from File:WiktionaryEn.svg, a logo showing a 3 x 3 matrix of variously rotated tiles with a letter or character on each tile. The derivation consisted in removing the tiles that form the background of each of the shown characters. File:WiktionaryEn.svg is under Creative Commons Attribution-Share Alike, created by Smurrayinchester, and attributed to Wikimedia Foundation. This is the version without the wordmark.
Gray798.png
Distribution of cutaneous nerves. Dorsal aspect.
Surface projections of the organs of the trunk.png
Surface projections of the major organs of the trunk, using the vertebral column and rib cage as main reference points of superficial anatomy. The transpyloric plane and McBurney's point are among the marked locations.

To discuss image, please see Talk:Human body diagrams

Gray797.png
Distribution of cutaneous nerves. Ventral aspect.