Word Count : 522

---

The integument of primitive fishes is simple in organization yet functionally efficient, reflecting their early evolutionary position among vertebrates. It consists of the skin along with its derivatives and plays important roles in protection, respiration, osmoregulation, and sensory reception. In primitive fishes such as cyclostomes and early cartilaginous fishes, the integument shows characteristic features that distinguish it from that of higher fishes. The skin is typically divided into two main layers: the outer epidermis and the inner dermis. The epidermis is of ectodermal origin and is made ______ ________ _____ _____ ________ ____ ________ _______.
__________ _________ ___ ____ ____ ___ __________ _________ _____ _________ ________.
_______ ___ _______ _____ ________ ____ _____ _____.
_____ ______ ____ ________ _______ ________ _____ ______ ______.
_________ __________ _____ ____ ___ ______.
________ ___ _____ _____ _____ ______.
_______ ___ ______ ______ ________ ______.
____ ______ _______ ______ _______ _______ _________ ________ _______ __________ _____.
_____ ______ _____ _______ _____ _____ __________ _________ _________ _______.
______ ______ __________ ______ __________ ____ _____ ___ ______ _______ _____ ______.
______ _________ _______ _________ _________ ______ ________ ___ _____.
_________ _______ _____ _________ _____ _________ ________ ______ _________ ____.
__________ _________ _______ ______ ___ _____ ______ _____ __________ __________.
___ _______ ___ ___ ________ _____.
__________ ________ _______ _____ ______ ___ _______ _______ _______ ___ __________ _______.
___ __________ ________ __________ ____ _________.
___ ___ __________ ____ ______ _______ _____ _____.
__________ _______ ____ ___ ___ __________ ______ ____ ______ _________ _____ ______.
_________ ___ ____ ________ _____ __________ _________.
_______ ___ ________ ___ ______ _____ ___ ___ _________ _____ ________ ________.
_____ __________ _________ __________ _________ _______ ________.
________ _________ ____ ______ _________ ___ ___ ________.
______ _____ ____ ____ _________ ____ _____ ________ _____ __________ ______ ____.
____ ___ ____ __________ __________ _______ _________ __________.
_______ _______ _________ ___ ________ ____ ________ __________.
_____ __________ _________ _________ __________ ____.
______ __________ ______ ____ _______ ________ ____ __________ _______.
________ _____ __________ __________ ________ ________.
_______ _____ ________ __________ ___ ______ _____ _________ ________ ___ ________ __________.
_________ _________ ____ __________ ___.
__________ ______ __________ _________ ________ __________.
_______ ___ ______ _____ ____ ________ __________ _________ _________ _____ _______ __________.
_________ ________ ______ _______ ______ ___ ________ _____.
____ ________ ________ ____ ___.
________ ______ _____ ______ ___ ___ ________ ________ _______ ____ ________ _________.
____ _______ ____ ___ ___ _______ ____ _________.
___ _______ ______ _____ _________ ________ _________ _______ ______ ______.
____ __________ __________ _____ ________ ____ ____.
_____ _____ ______ ________ ____ ____ _________ ____ ________ _________.
_____ ____ _____ _______ ______ _________.
__________ _____ ________ _______ ____ _________ ________ __________ ____ __________ _______.
_____ _____ _______ ______ ________ ________ ___ ________ ______.
______ ________ __________ ________ ___ ________.
________ _____ ______ ________ _______ _______ ________ _________ ____ _______ ______ ______.
______ _____ ________ _______ ___ __________ _________.
____ ______ _____ __________ ______ _______ _________ __________ __________ ________ _____.
____ ________ _______ ____ _________ ________ ____ ___ _________ _____.
__________ _______ _________ _____ _____ ________ ___.
___ _________ ___ ___ ____ ___ ______ ________ ___ ____.
______ ________ _____ __________ __________ ___.
___ ____.
Get Full Answer on WhatsApp