Question

In vertebrates, chemical messengers called hormones are secreted by the _____ system. endocrine excretory hormonal pituitary

Answer 1

endocrine system is responsible for secretion of hormones

Answer 2

Option). endocrine.

Step-by-step explanation:

The endocrine system can be defined as a system, consists of glands and hormones that regulate various functions of distantly located organs or tissues.

These glands are known as endocrine glands that release their contents or hormones directly into the bloodstream. Blood transports these hormones to different parts of the body, where they show their response.

Thus, the correct answer is to be filled in the blank is 'endocrine.'