spina externa

A median bony point projecting from the anterior and ventral margin of the sternum of a bird. From http://www.merriam-webster.com/dictionary/spina%20externa.

Type	Bone
Parent Structure	bony projection

Frequently Asked Questions

What is the spina externa?

A median bony point projecting from the anterior and ventral margin of the sternum of a bird. From http://www.merriam-webster.com/dictionary/spina%20externa.

Related Structures

1st arch mandibular component ventral mandibular arch 1st arch mandibular ectoderm ectoderm of mandibular component 1st arch mandibular mesenchyme mandibular component mesenchyme 1st arch mandibular mesenchyme from head mesenchyme 1st arch mandibular mesenchyme from neural crest 1st arch maxillary component 1st arch maxillary ectoderm ectoderm of maxillary component 1st arch maxillary-mandibular cleft 1st arch maxillary-mandibular groove ectoderm

Medical Disclaimer

This content is for educational and informational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.