Epiphysis

Epiphysis
Epiphysis
	Structure of a long bone, with epiphysis labeled at top and bottom.
Details
Pronunciation	/ɛˈpɪfɪsɪs/
Part of	Long bones
Identifiers
MeSH	D004838
TA98	A02.0.00.018
TA2	393
FMA	24012
	Anatomical terminology

An epiphysis (from Ancient Greek ἐπί (epí) 'on top of', and φύσις (phúsis) 'growth'; pl.: epiphyses) is one of the rounded ends or tips of a long bone that ossify from a secondary center of ossification.^[3]^[4] Between the epiphysis and diaphysis (the long midsection of the long bone) lies the metaphysis, including the epiphyseal plate (growth plate). At the joint, the epiphysis is covered with articular cartilage; below that covering is a zone similar to the epiphyseal plate, known as subchondral bone. In evolution, reptiles do not have epiphyses and diaphyses, being restricted to mammals.

The epiphysis is filled with red bone marrow, which produces erythrocytes (red blood cells).

^ OED 2nd edition, 1989 as /εˈpɪfɪsɪs/.
^ Entry "epiphysis" in Merriam-Webster Online Dictionary.
^ Chaurasia, B. D. (2009). B D Chaurasia's Handbook of General Anatomy (4th ed.). Delhi, India: CBS. p. 41. ISBN 978-8123916545. OCLC 696622496.
^ "Epiphysis | Definition, Anatomy, & Function | Britannica". www.britannica.com. Retrieved 2023-01-28.

[1] OED 2nd edition, 1989 as /εˈpɪfɪsɪs/.

[2] Entry "epiphysis" in Merriam-Webster Online Dictionary.

[3] Chaurasia, B. D. (2009). B D Chaurasia's Handbook of General Anatomy (4th ed.). Delhi, India: CBS. p. 41. ISBN 978-8123916545. OCLC 696622496.

[4] "Epiphysis | Definition, Anatomy, & Function | Britannica". www.britannica.com. Retrieved 2023-01-28.

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