New skull

New skull, neocranium - a phylogeny younger part of the skull found in oviducts.

In the skull region, two parts can be distinguished in terms of its phylogeny. The number of cranial nerves follows. While there are only 10 pairs of cranial nerves in goatfish, fish and amphibians, skulls, birds and mammals are skulled by 12 pairs of cranial nerves. Secondary (XI) and sublingual (XII) nerves present in oviduct are not found in more vertebrate bases.

The explanation of this fact is sought in the phylogenetic development of vertebrates. The skull found in fish or amphibians is called prada. In reptiles, birds or mammals, there are much more developed brains. As a result, the skull still contains the younger part of their skull, called the new skull. It developed from occipital sclerotomies (sclerotomas are mesenchymal vertebrae formed during embryonic development from an axillary mesoderm). It is also called the core skull. The formation of a skull fragment from vertebral fins partially confirms the theory of the vertebral origin of Okena and Goethe's skull, which is overturned in the case of the remaining large part of the skull, or prairie. Unusual in the vertebrate, the extra nerve is made up of the nerve, whereas the subluxar nerve is made up of several spinal nerves incorporated into the skull. Bibliography

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