"Planula" is a word in ENGLISH
The very young, free-swimming larva of the coelenterates.
It usually has a flattened oval or oblong form, and is entirely covered
with cilia.
In embryonic development, a vesicle filled with fluid,
formed from the morula by the divergence of its cells in such a manner
as to give rise to a central space, around which the cells arrange
themselves as an envelope; an embryonic form intermediate between the
morula and gastrula. Sometimes used as synonymous with gastrula.
Great love, you believe, carries the seeds of great sorrow. Well, perhaps you are right. Perhaps the wise spurn one to remain safe from the other, but I should rather choose to have my eyes burnt in their sockets than to have been born without.
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When an ape visits his tailor, what kind of a suit does he order?A zoo-t suit!
An embryonic form having its origin in the invagination or pushing in of the wall of the planula or blastula …
Read the complete definitionThe process of invagination, in embryonic development, by which a gastrula is formed.
Read the complete definitionThe primitive cell in certain embryonic forms.
Read the complete definitionDerived from epithelial cells and destined to become a part of the muscular system; -- applied to structural elements in …
Read the complete definitionOf or pertaining to the nose and the front of the head; as, the embryonic nasofrontal process which forms the …
Read the complete definitionThe organic basis of bone tissue; the residue after removal of the mineral matters from bone by dilute acid; in …
Read the complete definitionOne of the primary, or first-formed, segments of an embryonic arthropod.
Read the complete definition