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perpendicular bisector

The perpendicular bisector of a line segment AB is the straight line perpendicular to AB through the midpoint of AB.

skeletagenous septum

skeletagenous septum  

One of a series of segments which develop along the notochord and are separated by myosepta. Septa occur in two planes. Dorsal and ventral septa are plate-like processes which grow dorsally and ...
skeletagenous septum

skeletagenous septum   Quick reference

A Dictionary of Zoology (4 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
83 words

...septum One of a series of segments which develop along the notochord and are separated by myosepta . Septa occur in two planes. Dorsal and ventral septa are plate-like processes which grow dorsally and ventrally to the notochord; horizontal septa bisect this plane perpendicularly. Mesenchymal cells migrate to the skeletagenous septa during the gastrula stage of embryogenesis to form sclerotomic tissue ( see somite ). At the junction between the myoseptum and skeletagenous septum vertebrae develop; they are consequently intersegmental...

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