mezoderm

mezoderm

In animals with three tissue layers (i.e. all except sponges and cnidarians), the middle layer of tissue, between the ectoderm and the endoderm. In vertebrates, for instance, the mesoderm forms the skeleton, muscles, heart, spleen, and many other internal organs.

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Kalbos dalis: noun
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Pramonės šaka / sritis: Biology
Category: Zoology
Company: Berkeley
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posteljica

Biology; Zoology

In mammals, a tissue formed within the uterus through which nutrients are passed from the mother to the embryo (and later the fetus) and its wastes are removed. It is analogous to ...

patologija

Biology; Zoology

1. The study of disease and abnormalities. 2. The manifestation of a disease, injury, or abnormality, as in bone or eggshell for example.

bradavica

Biology; Zoology

In eggshell, the cone-like structure at the base of the shell unit where the shell unit attaches to the inner organic membrane.

vilica

Biology; Zoology

Often loosely applied to any movable, toothed structures at or near the mouth of an animal, such as the scolecodonts of annelids. In vertebrates, the jaw is derived from the first ...