File:Human week 10 fetus 11.jpg

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Human Female Fetus - Sacrum (10 week)

Large image version of plane D, close to midline (Stain - Haematoxylin Eosin). 0.3 mm scale bar

Axial Skeleton Development

Sacral vertebra (S1–S5) and coccyx (last 4 vertebra) both shown unfused and as cartilage, formed from sclerotome of somites 31 to 44. The cartilage will later ossify in the fetal period. The vertebra will later fuse postnatally from adolescence to the adult (18 - 30 years).

Note the remnant of the notochord present in the vertebral body.


Neural Development

Spinal cord (medulla spinalis), conus medullaris, dura mater, film terminale. Spinal cord has developed from the neural tube.

  • conus medullaris - (Latin, "medullary cone") is the tapered lower end of the spinal cord.


Gastrointestinal Development

Rectum lies anterior to the vertebra and has developed from the hindgut. Note the differentiated epithelial wall of the rectum.



Related Images

Human- fetal week 10 planes icon.jpg

Fetus (week 10) Planes A (most lateral), B (lateral), C (medial) and D (midline) from lateral towards the midline.

Image Source: UNSW Embryology, no reproduction without permission.



Cite this page: Hill, M.A. (2024, April 12) Embryology Human week 10 fetus 11.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Human_week_10_fetus_11.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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