Question

transverse
of gut chordata

Answer 1

S Van Noorden, AGE Pearse - The Evolution of Pancreatic Islets, 1976 - Elsevier

1. The protochordates to which Amphioxus belongs, are the most primitive living animals to possess at least some typical chordate characteristics, but neither in these nor in lower animals is there any … Part of atransverse section through the anterior mid gut of Amphioxus