Thoracic vertebrae

dorsal vertebraethoracic vertebrathoracicdorsal vertebradorsalthoracic spineback vertebraeT1thoracodorsals
In vertebrates, thoracic vertebrae compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae.wikipedia
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Cervical vertebrae

cervicalcervical spinecervical vertebra
In vertebrates, thoracic vertebrae compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae.
Truncal vertebrae (divided into thoracic and lumbar vertebrae in mammals) lie caudal (toward the tail) of cervical vertebrae.

Vertebral column

spinespinal columnspinal
In vertebrates, thoracic vertebrae compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae.
There are seven cervical vertebrae, twelve thoracic vertebrae and five lumbar vertebrae.

Lumbar vertebrae

lumbar vertebralumbar spinelumbar
In vertebrates, thoracic vertebrae compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae.
They are the largest segments of the vertebral column and are characterized by the absence of the foramen transversarium within the transverse process (since it is only found in the cervical region) and by the absence of facets on the sides of the body (as found only in the thoracic region).

Rib cage

ribsribcagefirst rib
They are distinguished by the presence of facets on the sides of the bodies for articulation with the heads of the ribs, as well as facets on the transverse processes of all, except the eleventh and twelfth, for articulation with the tubercles of the ribs.
A typical human rib cage consists of 24 ribs in 12 pairs, the sternum and xiphoid process, the costal cartilages, and the 12 thoracic vertebrae.

Intervertebral foramen

intervertebral foraminaneural foramenneural foramina
The intervertebral foramen is small, and circular, with two at each intervertebral level, one for the right and one for the left exiting nerve roots.
Cervical, thoracic, and lumbar vertebrae all have intervertebral foramina.

Vertebra

vertebraeneural spineneural arch
They are distinguished by the presence of facets on the sides of the bodies for articulation with the heads of the ribs, as well as facets on the transverse processes of all, except the eleventh and twelfth, for articulation with the tubercles of the ribs. In humans, there are twelve thoracic vertebrae and they are intermediate in size between the cervical and lumbar vertebrae; they increase in size going towards the lumbar vertebrae, with the lower ones being a lot larger than the upper.
There are thirty-three vertebrae in the human vertebral column—seven cervical vertebrae, twelve thoracic vertebrae, five lumbar vertebrae, five fused sacral vertebrae forming the sacrum and three to five coccygeal vertebrae, forming the coccyx.

Bronchus

bronchibronchialbronchial tubes
The human trachea divides into two main bronchi at the level of the 5th thoracic vertebra, but may also end higher or lower, depending on breathing.
The carina of the trachea is located at the level of the sternal angle and the fifth thoracic vertebra (at rest).

Trachea

windpipetrachealtracheae
The human trachea divides into two main bronchi at the level of the 5th thoracic vertebra, but may also end higher or lower, depending on breathing.
The trachea begins level with the sixth cervical vertebra (C6) and the carina is found at the level of the sixth thoracic vertebra (T6), opposite the sternal angle and can be positioned up to two vertebrae lower or higher, depending on breathing.

Facet joint

facet jointsfacetszygapophyseal joint
They are distinguished by the presence of facets on the sides of the bodies for articulation with the heads of the ribs, as well as facets on the transverse processes of all, except the eleventh and twelfth, for articulation with the tubercles of the ribs.

Xiphoid process

xiphisternumxiphoid cartilagexiphosternal junction
The eighth thoracic vertebra is, together with the ninth thoracic vertebra, at the same level as the xiphisternum.
The xiphoid process is considered to be at the level of the 9th thoracic vertebra and the T7 dermatome.

Sternal angle

Angle of LouisManubriosternal jointsternal angle of Louis
The fourth thoracic vertebra, together with the fifth, is at the same level as the sternal angle.
The sternal angle, which varies around 162 degrees in males, marks the approximate level of the 2nd pair of costal cartilages, which attach to the second ribs, and the level of the intervertebral disc between T4 and T5.

Vertebral foramen

foraminaneural canal
The vertebral foramen is the large opening posterior to the vertebral body also known as the spinal canal.

Articular processes

zygapophysesprezygapophysespostzygapophyses
The superior articular processes are thin plates of bone projecting upward from the junctions of the pedicles and laminae; their articular facets are practically flat, and are directed backward and a little lateralward and upward.

Cetacea

cetaceancetaceanswhales
12 to 15 is common among mammals, with 18 to 20 in horses, tapirs, rhinoceroses, and elephants, and extremes in mammals are marked by certain sloths with 25 and cetaceans with 9.
The fins are carried by the thoracic vertebrae, ranging from nine to seventeen individual vertebrae.

Costovertebral joints

costovertebral jointCostovertebral articulationscostovertebral
The articulation of the head of the rib connects the head of the rib to the bodies of the thoracic vertebrae.

Vertebrate

Vertebratavertebratesvertebral
In vertebrates, thoracic vertebrae compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae.

Joint

jointsarticulationarticulated
They are distinguished by the presence of facets on the sides of the bodies for articulation with the heads of the ribs, as well as facets on the transverse processes of all, except the eleventh and twelfth, for articulation with the tubercles of the ribs.

Thoracic spinal nerve 1

T1T1 roots
The thoracic spinal nerve 1 (T1) passes out underneath it.

Thoracic spinal nerve 2

T2
The thoracic spinal nerve 2 (T2) passes out underneath it.

Thoracic spinal nerve 3

T3
The thoracic spinal nerve 3 (T3) passes out underneath it.

Thoracic spinal nerve 4

T4
The thoracic spinal nerve 4 (T4) passes out underneath it.

Thoracic spinal nerve 5

T5T5 vertebra
The thoracic spinal nerve 5 (T5) passes out underneath it.

Thoracic spinal nerve 6

T6
The thoracic spinal nerve 6 (T6) passes out underneath it.

Thoracic spinal nerve 7

T7
The thoracic spinal nerve 7 (T7) passes out underneath it.