Rathke Rath·ke (rät'kə), Martin Heinrich. 1793-1860.
German biologist who discovered gill slits and branchial arches in bird and mammal embryos.
Through rathke's work the real embryonic archetype of the vertebrate skull was for the first time disclosed.
The clavicle is stated by rathke to be at first continuous with the coraco-scapular plate.
rathke was an able and careful critic of the vertebral theory of the skull, but he accepted it in the main.
Mr. Newport has described the course of this concentration in insects; and by rathke it has been traced in crustaceans.
The ectognath, which has become the large median ventral tentacle, called by rathke the tongue, supplied by the tongue nerve ; 3.
Later in the same year rathke discovered gill-slits in the chick, in this case finding only three.
Any one of these is represented in section in Fig. 65, and represents a branchial unit in rathke's view and in mine.
In this paper he confirmed rathke's discovery, and described the slits and arches in the dog and the chick.
He described for Coregonus an origin of the skull in the main similar to that established by rathke for the adder.
Von Baer saw what had escaped rathke and Huschke, that there were, not three nor four, but as many as five aortic arches.