gastrula
/ˈɡastrʊlə
/noun (plural gastrulae /ˈɡastrʊliː/) Embryology
An embryo at the stage following the blastula, when it is a hollow cup-shaped structure having three layers of cells.Using light microscopy, he concluded that the embryo underwent gastrulation and that the gastrula consisted of three ‘cell elements’ on the outside, and two on the inside....
- During gastrulation, cells on the outside of the embryo move inwards and, in animals such as the sea urchin, gastrulation even transforms a hollow spherical blastula into a gastrula with a hole through the middle - the gut.
- Gastrulation in its broadest sense is the reorganization of the cells of the blastula to form a multilayered embryo, the gastrula.
Derivatives
gastrulation
/ noun ...- I will focus here on experimental analyses of a morphogenetic process: the behavior of the amphibian dorsal marginal zone during gastrulation.
- This is in accordance with other modern interpretations of gastrulation in the Porifera.
- These are formed by mesenchyme cells that ingress during gastrulation, as in sea urchins.
Origin
Late 19th century: modern Latin, from Greek gastēr, gastr- 'stomach' + the Latin diminutive ending -ula.