The evolution of a body cavity, a space filled with fluid between the outer walls of the body and the digestive system, was a crucial adaptation for animals.
An internal body cavity is a space filled with fluid that houses and safeguards internal organs. Membranes and other structures divide the human body's cavities. The dorsal cavity and ventral cavity of the human body are its two biggest cavities. There are smaller body cavities that divide these two body cavities.
The two primary body cavities in a human are. The first cavity, known as the ventral cavity, is a sizable space that sits ventrally to the spine and houses all of your internal organs, from your pelvis to your throat. The mesoderm that forms in this cavity during human embryogenesis is the true coelom.
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