mesoderm
Americannoun
noun
-
The middle of the three primary germ layers of the embryos of vertebrates and other complex animals. In vertebrates, the mesoderm gives rise to the muscles, bones, cartilage, connective tissue, blood, blood and lymph vessels, dermis, kidneys, and gonads. The mesoderm develops during gastrulation from either the ectoderm or the endoderm. The embryos of simpler animals lack a mesoderm.
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During normal embryonic development, they give rise to three major cell types: endoderm, ectoderm, and mesoderm.
From Science Daily ● Aug. 28, 2026
With this unprecedented clarity, the team directly observed two key moments in gastrulation: the first epiblast symmetry-breaking event and the emergence of the molecular markers of the primitive streak and mesoderm upon in vitro attachment.
From Science Daily ● Mar. 23, 2024
Moreover, the experiments provide evidence that the vertebrate head mesoderm diverged during the early phases of vertebrate evolution.
From Science Daily ● Jan. 10, 2024
Sandwiched between these two layers is a living mesoderm.
From Textbooks ● Jan. 1, 2015
The shading is due to an increased growth of cells, because here the three germinal layers—embryonic ectoderm, mesoderm, and entoderm—are in contact.
From Embryology The Beginnings of Life by Gerald R. Leighton
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