Body Wall of Barnchiostoma (With Diagram) | Chordata | Zoology
The body wall (Fig. 6.4) is formed of outermost thin, transparent skin, well-developed musculature and a parietal peritoneum. Skin: There is a thin, outermost, perforated cuticle covering an epidermis which, unlike vertebrates, is made of a single layer of columnar epithelial cells. These are placed on a basement membrane. Cuticle is secreted by the epidermal cells. In between the epidermal [...]