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Thus community in embryonicstructure reveals community of descent, however much the structure of the adult may have been modified.
2
Given the fact that both the thymus and the inferior parathyroid are derivatives of the same embryonicstructure (i.e.
3
The characteristic composition of the vertebrate body develops from the embryonicstructure in the same way in man as in all the other vertebrates.
4
The nearest of living animals to this embryonicstructure are the lowest Tunicates, the Copelata (Appendicaria) and the larvae of the Ascidia.
5
Two of these embryonicstructures, the yelk-sac and allantois, are already known to us.
6
These are most interesting embryonicstructures.
7
The mucous tissue, as Virchow calls it, common in embryonicstructures, seen in the vitreous humor of the adult.
8
In later stages they gradually disappear from most embryonicstructures but are strongly accumulated in the nuclei of some specific cell types and organs.
9
What is called the "blastula" of the mammal and the real blastula of the amphioxus and many of the invertebrates are totally different embryonicstructures.