nerve-tube

At the sides of the primitive nerve-tube small blocks of cells arise to develop into primitive muscles and other structures.

The Doctrine of Evolution Its Basis and Its Scope Henry Edward Crampton

From the ventral surface of the collar nerve-tube numerous motor fibres may be seen passing to the subjacent musculature.

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" Various

Or increased growth over a section of a tube causes it to swell out; in this wise the brain develops from the nerve-tube, the stomach from the alimentary tube.

Form and Function A Contribution to the History of Animal Morphology

These hollow roots terminate blindly in the dorsal epidermis of the collar, and place the nervous layer of the latter in direct connexion with the fibres of the nerve-tube.

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" Various

In accordance with this view there would be also some probability in favour of regarding the collar nerve-tube of the

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" Various

(Evolved from Scolecida by formation of dorsal nerve-tube and chorda, and resembling tailed larvæ of Ascidians.) 4.

Form and Function A Contribution to the History of Animal Morphology

Rapid growth concentrated at one point brings about an evagination; in this manner are formed the sense-organs from the nerve-tube, the liver and lungs from the alimentary tube.

Form and Function A Contribution to the History of Animal Morphology

The dorsal epidermal nerve-tract is continued in front into the ventral wall of the collar nerve-tube, and at the point of junction there is a circular commissural thickening following the posterior rim of the collar and affording a special connexion between the dorsal and ventral nerve-tracts.

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" Various

In all cases the nerve-tube (m) lies on the dorsal side of the bilateral, worm-like body, the gut-tube (d) on the ventral side, the chorda (ch) between the two, on the long axis, and the coelom pouches (c) at each side.

The Evolution of Man — Volume 1 Ernst Heinrich Philipp August Haeckel 1876

Thus out of the flat gut-plate is formed a hollow gut-tube, out of the flat spinal plate a hollow nerve-tube, from the skin-plate

The Evolution of Man — Volume 1 Ernst Heinrich Philipp August Haeckel 1876