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Red: notochord; Magenta: axochord; Green: nerve chord; Blue: epidermis; Yellow: mesoderm. The notochord is an elastic, rod-like structure found in chordates. In chordate vertebrates the notochord is an embryonic structure that disintegrates, as the vertebrae develop, to become the nucleus pulposus in the intervertebral discs of the vertebral ...
However, following Heinrich Schenker's usage in Free Composition, some authors reserve the term "neighbor note" to the lower neighbor a half step below the main note. [6] The German term Nebennote is a somewhat broader category, including all nonchord tones approached from the main note by step. [6]
In addition, gene expression studies have failed to provide any evidence for homology between the notochord and the stomochord, or between the notochord and any hemichordate structure. The Brachyury (T) gene, which is expressed in the ascidian and other chordates notochord, is not expressed in the stomochord, and collagen is absent. [2]
Epithelium – All tissues bounding a free surface. [1] Equidistant – Equally spaced, as the spiral lines on some snail shells. [1] Equilibrating – Balancing equally. [1] Eroded – Worn away, as the epidermis on some shells. [1] Erosive – Capable of erosion. [1] Excavated – Hollowed out, as the columella of some snails. [1]
In the 10 somite embryo, Carnegie No. 5074, the prechordal plate is continuous posteriorly with the notochord, and is made up of about 35-40 cells. The prechordal mesenchyme proliferates laterally over the junction of the dorsal aorta and first aortic arch on each side. Gilbert P.W., (1957) STAGE 11
Thus, to "take the reins" means to assume control, and to have "free rein" means to be free of constraints. [73] Standard: From dozens of ideas floated to rein in skyrocketing costs of Oregon's public pension system, Gov. John Kitzhaber and lawmakers two years ago pinned their hopes on one, risky option. [74]
In this way, the dorsal nerve cord actually runs through the tail to the left of the notochord, connecting to the rest of the nervous system at the caudal ganglion at the base of the tail. [18] The muscle bands surrounding the notochord and nerve cord consist of rows of paired muscle cells, or myocytes, running along the length of the tail.
The first published English grammar was a Pamphlet for Grammar of 1586, written by William Bullokar with the stated goal of demonstrating that English was just as rule-based as Latin. Bullokar's grammar was faithfully modeled on William Lily's Latin grammar, Rudimenta Grammatices (1534), used in English schools at that time, having been ...