Question

Which system is not directly connected to itself?

A.) Skeletal
B.) Digestive
C.) Endocrine

Answer 1

C) Endocrine

Step-by-step explanation:

The endocrine system is a chemical messenger system comprising feedback loops of the hormones released by internal glands of an organism directly into the circulatory system, regulating distant target organs.

Here, in endocrine system the endocrine glands are circulated through circulatory system so it is not directly connected to itself.

Answer 2

The answer is C.) Endocrine