A true coelom is ______.
A) completely lined with tissue derived from endoderm
B) completely lined with tissue derived from mesoderm
C) formed when a zygote develops into a blastula
D) completely lined with tissue derived from ectoderm

Question

Quizplus · Accepted Answer

A true coelom is a body cavity completely lined with tissue derived from mesoderm. The mesoderm forms during gastrulation, which is the process of the blastula (a ball of cells formed by the zygote) rearranging into a three-layered embryo with an endoderm, mesoderm, and ectoderm. The coelom is a space within the mesoderm that forms during development. It is important for providing a fluid-filled space for organ movement and protecting organs from damage.

A True Coelom Is ______