Question

The cavity of the gastrula is called
A. Blastocoel
B. Coelom
C. Archenteron
D. Haemocoel

Answer 1

Gastrula, early multicellular incipient organism, made out of at least two germinal layers of cells from which the different organs later determine. The gastrula creates from the empty, single-layered bundle of cells called a blastula which itself is the result of the rehashed cell division, or cleavage, of a treated egg. It is the embryo stage following the blastula stage.

Complete answer: The cavity of the gastrula is the archenteron cavity which is shaped by the invagination of cells. Archenteron (gastrocoel) A cavity inside a creature undeveloped organism at the gastrula phase of advancement. All or part of the archenteron, in the end, frames the cavity of the gut.
Haemocoel is the body cavity found in vertebrates. It functions as a circulatory system in insects.
The coelom is the body cavity which is lined by a mesoderm.
Blastocoel is the cavity of the blastula and chorion is an extra undeveloped layer that frames the placenta in well-evolved creatures.
Hence, the right choice is 'Archenteron’, i.e., Option C.

Note: Archenteron is associated with the outside by an opening (the blastopore), which turns out to be either the mouth, the mouth, and butt, or the butt-centric opening of the creature. Gastrula is where the morphogenetic developments and the arrangement of germ layers happens. It is a hollow cup-shaped structure. It comprises three layers.