Cannabaceae

Spinal veins
1: Posterior spinal vein
2: anterior spinal vein
3: posterolateral spinal vein
4: radicular (or segmental medullary) vein
5: posterior spinal arteries
6: anterior spinal artery
7: radicular (or segmental medullary) artery
Details
Drains toIntervertebral veins
Identifiers
Latinvenae spinales
TA98A12.3.07.023
FMA71580
Anatomical terminology

The spinal veins (veins of the medulla spinalis or veins of the spinal cord) are situated in the pia mater and form a minute, tortuous, venous plexus.

They emerge chiefly from the median fissures of the medulla spinalis and are largest in the lumbar region.

In this plexus there are:

  • (1) two median longitudinal veins, one in front of the anterior fissure, and the other behind the posterior sulcus of the cord.
  • (2) four lateral longitudinal veins which run behind the nerve roots.

They end in the intervertebral veins.

Near the base of the skull they unite, and form two or three small trunks, which communicate with the vertebral veins, and then end in the inferior cerebellar veins, or in the inferior petrosal sinuses.

References

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Public domain This article incorporates text in the public domain from page 669 of the 20th edition of Gray's Anatomy (1918)

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One thought on “Cannabaceae

  1. Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
    View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction

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