Search
PTM
- Dec 17, 2021
- 4 min
INTRODUCTION TO PHYLUM CHORDATA
Chordates are neither the foremost various nor the foremost important of the animal phyla, although, in phrases of the number of species,...
PTM
- Dec 2, 2021
- 3 min
DEVELOPMENT OF THE INTEGUMENTARY SYSTEM
The dermis springs from the ectoderm, which covers the floor of the embryo. Initially, at approximately the fourth week after...