Question

In the process of evolution excretory structure first appeared in me who am I​

Answer 1

Answer:

i am vertibrate excretory system

Answer 2

Answer:

Evolution of the vertebrate excretory system. Studies of the embryonic development of primitive vertebrates, such as the dogfish shark, clearly show that the excretory system arises from a series of tubules, one pair in every segment of the body between the heart and the tail.

Explanation: