What animals first developed a body cavity?
| November 23, 2020 | education
in coelenterates, a primary body cavity first appeared, a secondary body cavity first appeared in annelids.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
