Torso
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Torso is an anatomical term for the central part of the many animal bodies (including that of the human) from which extend the neck and limbs. It is sometimes referred to as the trunk. The torso includes the thorax and abdomen.
Anatomy
Major organs
Most critical organs are housed within the torso. In the upper chest, the heart and lungs are protected by the rib cage, and the abdomen contains the majority of organs responsible for digestion: 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 excreted; the rectum, which stores feces; the gallbladder, which stores and concentrates bile and produces chyme; the ureters, which passes urine to the bladder; the bladder, which stores urine; and the urethra, which excretes urine and 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 muscle groups of the body, including the:
Innervation
The organs and muscles etc. are innervated by various nerves, mainly originating from thoracic vertebral segments. For instance, the cutaneous innervation is provided by:
References
See also
Human anatomical features | ||
|---|---|---|
| Head | Skull · Forehead · Eye · Ear · Nose · Mouth · Tongue · Teeth · Jaw · Face · Cheek · Chin |  |
| Neck | Throat · Adam's apple | |
| Torso | Shoulders · Spine · Breast · Chest · Ribcage · Abdomen · Navel Sex organs (Clitoris · Vagina · Penis · Scrotum · Testicle) – Hip · Anus · Buttocks | |
| Limbs | Arm · Elbow · Forearm · Wrist · Hand · Finger (Thumb · Index · Middle · Ring · Little) · Leg · Lap · Thigh · Knee · Calf · Heel · Ankle · Foot · Toe (Hallux) | |
| Skin | Hair | |
Anatomy of torso, respiratory system: Lungs and related structures | |
|---|---|
| lungs | right • left • lingula • apex • base • root • cardiac notch • cardiac impression • hilum • borders (anterior, posterior, inferior) • surfaces (costal, mediastinal, diaphragmatic) • fissures (oblique, horizontal) |
| conducting zone | trachea (tracheal rings, carina) • bronchi • main bronchus (right, left) • lobar/secondary bronchi (eparterial bronchus) • segmental/tertiary bronchi (bronchopulmonary segment) • bronchiole • terminal bronchiole |
| respiratory zone | |
| pleurae | parietal pleura (cervical, costal, mediastinal, diaphragmatic) • visceral pleura • pulmonary ligament • recesses (costomediastinal, costodiaphragmatic) • pleural cavity |
Arteries of torso - abdomen | |||||||
|---|---|---|---|---|---|---|---|
| AA: Anterior |
| ||||||
| AA: Posterior | visceral: middle suprarenal – renal (inferior suprarenal) – testicular/ovarianparietal: inferior phrenic (superior suprarenal) – lumbar – median sacral terminal: common iliac (IIA, EIA) | ||||||
| IIA: Anterior |
(superior vesical,
to ductus deferens) –
inferior vesical –
middle rectal –
uterine
(azygos of the vagina) –
vaginal –
obturator
(anterior branch,
posterior branch) –
internal pudendal
(inferior rectal,
perineal,
artery of the urethral bulb,
urethral,
deep artery of the penis,
dorsal artery of the penis) –
inferior gluteal
(accompanying of ischiadic nerve,
crucial anastomosis)
| ||||||
| IIA: Posterior | |||||||
| EIA | |||||||
Anatomy of torso (primarily): the spinal cord | |||||
|---|---|---|---|---|---|
| Spinal nerve | Dorsal (Root, Ganglion, Ramus) • Ventral (Root, Ramus) • Sympathetic trunk • rami communicantes (Gray, White) | ||||
| Gray matter/Rexed laminae | Posterior horn (Posteromarginal nucleus, Column of Clarke, Substantia gelatinosa of Rolando, Nucleus proprius)
Lateral horn/Anterior horn (Intermediolateral nucleus) Central canal/Substantia gelatinosa centralis - Gray commissure | ||||
| White matter |
| ||||
| Layers | Epidural space • Dura mater • Subdural space • Arachnoid mater • Subarachnoid space • Pia mater | ||||
| Other structures | Denticulate ligaments • Conus medullaris • Cauda equina • Filum terminale • Cervical enlargement • Lumbar enlargement
Anterior median fissure • Posterior median sulcus Anterior white commissure | ||||
Lymphatics of torso | |
|---|---|
| Chest | Right lymphatic duct - Thoracic duct (spans diaphragm) Bronchomediastinal trunk (Tracheobronchial, Parasternal) - Intercostal |
| Abdomen | Cisterna chyli
Lumbar trunk - lumbar/paraaortic: Retroaortic - Lateral aortic - iliac: Common (External, Internal, Sacral) Intestinal trunk - preaortic: Celiac (Gastric, Hepatic, Splenic) - Superior mesenteric (Mesenteric, Ileocolic, Mesocolic) - Inferior mesenteric (Pararectal) |
Anatomy of torso, digestive system: Gastrointestinal tract | |
|---|---|
| Upper GI: to stomach | Mouth • Pharynx (nasopharynx, oropharynx, hypopharynx) • Esophagus • Crop |
| Upper GI: stomach | rugae - gastric pits - cardia/gland - fundus/gland - pylorus/gland - pyloric antrum - pyloric canal - greater curvature - lesser curvature - angular incisure |
| Lower GI: intestines | Small intestine: Duodenum (Suspensory muscle, Major duodenal papilla, Minor duodenal papilla) • Duodenojejunal flexure • Jejunum • Ileum • continuous (intestinal villus, crypts of Lieberkühn, circular folds)
Junction: Vermiform appendix • Ileocecal valve Large intestine: Cecum • Colon (ascending colon, hepatic flexure, transverse colon, splenic flexure, descending colon, sigmoid colon) • continuous (taenia coli, haustra, epiploic appendix) |
| Lower GI: termination | Rectum: Houston valve • rectal ampulla • pectinate line
Anal canal: anal valves • anal sinuses • anal columns • Hilton's white line Anus: Sphincter ani internus muscle • Sphincter ani externus muscle |
| Lower GI: lymph | GALT: Peyer's patches (M cells) |
Anatomy of torso, digestive system: Digestive glands | |
|---|---|
| Liver | by region: Left lobe (Caudate lobe, Quadrate lobe) • Right lobe • Transverse fissure of liver
by function: Fibrous capsule of Glisson • Hepatocyte • Space of Disse • Space of Mall • Kupffer cell • Liver sinusoid • Ito cell • Hepatic lobule bile ducts: Bile canaliculus • Canals of Hering • Interlobular bile ducts • Intrahepatic bile ducts • Left and Right hepatic ducts • Common hepatic duct |
| Gallbladder | by region: Body • Fundus • Neck ducts: Cystic duct |
| Pancreas | by region: Tail • Body • Head • Uncinate process
by function: Islets of Langerhans • Exocrine pancreas ducts: Pancreatic duct • Accessory pancreatic duct |
| Common | Common bile duct • Hepatopancreatic ampulla • Sphincter of Oddi |
General anatomy of torso | |
|---|---|
| Thorax/ Thoracic cavity | Mediastinum (Superior, Anterior, Middle, Posterior) • Superior thoracic aperture • Inferior thoracic aperture • Triangle of auscultation • Intercostal space • Thoracic plane • Thoracic wall/Thoracic cage - fascia (Pectoral fascia, Clavipectoral fascia, Thoracolumbar fascia) • Chest • Midsternal line |
| Thoracic diaphragm | openings (Caval opening, Esophageal hiatus, Aortic hiatus, Foramina of Morgagni) • Central tendon • Crus of diaphragm • arcuate ligaments (Lateral, Medial, Median) |
| Abdomen/ Abdominal cavity | Retroperitoneum • Paracolic gutters • Hepatobiliary triangle
anterior abdominal wall (Arcuate line, Linea alba, Tendinous intersection, Linea semilunaris, McBurney's point, Traube's space, Inguinal triangle) • Inguinal canal (Deep inguinal ring, Superficial inguinal ring, Intercrural fibers, Crura of superficial inguinal ring) • Lumbar triangle • regions (Epigastrium, Hypochondrium, Umbilical region, Latus, Hypogastrium, Inguinal region) • planes (Transpyloric plane, Intertubercular plane, Midclavicular line) fascia (Fascia of Camper, Fascia of Scarpa, Transversalis fascia, Renal fascia, Rectus sheath) |
| Pelvis/ Pelvic cavity | Pelvic floor • Retropubic space fascia (Pelvic fascia, Superior fascia of diaphragm of pelvis, Inferior fascia of diaphragm of pelvis, Fascia of the Obturator internus, Tendinous arch, Iliac fascia, Iliopectineal fascia) |
| Perineum | Anal triangle (Ischioanal fossa, Pudendal canal, Anococcygeal raphe)
Urogenital triangle (Superficial perineal pouch, Deep perineal pouch) fascia (Dartos/fascia of perineum/superficial perineal fascia/Fascia of Colles, Perineal membrane/"Inferior fascia of UGD", "Superior fascia of UGD") |
| |||