NEET PG DENTAL EXAM

EMBRYOLOGY

FERTILISATION EARLY DEVELOPMENT OF EMBRYO AND IMPLANTATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The ____ is the embryo when it is a multi-celled solid ball of cells.
A
blastula
B
morula
C
zygote
D
gastrula
E
fetus
Explanation: 

Detailed explanation-1: -Hydrostatic pressure of the fluid creates a large cavity in the morula called a blastocoel. Embryoblast cells also known as the inner cell mass form a compact mass of cells at the embryonic pole on one side of the cavity that will go on to produce the embryo proper. The embryo is now termed a blastocyst .

Detailed explanation-2: -Morulae, referred to as day 4 embryos, are characterized by cell compaction beginning at the 8-to 10-cell stages in early embryonic development, and are described as “an indistinguishable mass of cells” [10].

Detailed explanation-3: -Morula is a solid ball of cells during early embryonic development and consists of: 1. 4 – 8 cells.

There is 1 question to complete.