Twelfth rib

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Bone: Twelfth rib
Twelfth rib.
Sagittal section through posterior abdominal wall, showing the relations of the capsule of the kidney.
Gray's	subject #28 126

The twelfth rib has a single articular facet on the head, which is of rather large size. It has no necks or tubercles, and is pointed at its anterior ends.

The twelfth has angle nor costal groove; it is much shorter than the eleventh rib, and its head is inclined slightly downward.

Sometimes the twelfth rib is even shorter than the first rib.

See also

• False ribs
• Floating rib
• Subcostal nerve

Additional images

Anterior surface of sternum and costal cartilages.

The Obliquus internus abdominis.

Muscles of the iliac and anterior femoral regions.

Transverse section through the middle of the first lumbar vertebra, showing the relations of the pancreas.

External links

• -610664388 at GPnotebook
• Atlas of anatomy at UMich abdo_wall56

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

v • d • e Bones of torso
Sternum	Suprasternal notch, Manubrium, Sternal angle, Body of sternum, Xiphisternal joint, Xiphoid process
Rib	specific ribs (1, 2, 9, 10, 11, 12, false - 8-12, floating - 11-12) - parts (Angle, Tubercle, Costal groove, Neck, Head)
General vertebral structures	body of vertebra, vertebral arch (pedicle, lamina, vertebral notch), foramina (vertebral, intervertebral), processes (transverse, articular / zygapophysis, spinous)
Cervical vertebrae	C1 (anterior arch, posterior arch, lateral mass), C2 (dens), C3, C4, C5, C6, C7 anterior tubercle, posterior tubercle, foramen transversarium
Thoracic vertebrae	T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12 costal facets (superior, inferior, transverse)
Lumbar vertebrae	accessory process, mammillary process, L5
Sacrum	pelvic surface (anterior sacral foramina), dorsal surface (posterior sacral foramina, median sacral crest, medial sacral crest, lateral sacral crest), lateral surface (sacral tuberosity), base, sacral hiatus - presacral space - sacral promontory - sacral canal - ala of sacrum - sacrovertebral angle