Multiple choice

Which of the following layers develop(s) first during embryonic development?

  1. Ectoderm

  2. Mesoderm

  3. Endoderm

  4. Both 2 and 3

  5. -
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The germ layers develop early in embryonic life, through the process of gastrulation. During gastrulation, a hollow cluster of cells reorganises into two primary germ layers: an inner layer called endoderm and an outer layer called ectoderm. Endoderm being the inner layer, develops firstly.

Keep practicing — related questions