Which division of the nervous system is the broadest (or most inclusive)?

Peripheral

Explanation:

The Peripheral Nervous System (PNS) is the longest division of the nervous system and is formed by the nerves and nerve ganglia. Its function is to connect the Central Nervous System to other organs of the body and thereby carry the information transport.

It is one of the divisions of the Nervous System, which is anatomically divided into:

idk what happened..you tell

osteogenesis imperfecta (oi) refers to a congenital ailment of bones. in the condition, the bones become brittle or fragile. this ailment is a general result of the defect or mutations in the genes (colia1 or colia2). this mutation results in imperfect collagen formation either in quantity or quality wise.  

there are eight kinds of oi defects, and each kind varies with certain distinctions in symptoms. the usual symptoms include frequent bone fractures, loss of hearing in infants, protruding eyes, discoloration of the white in the eyes, respiratory issues, loosening of the joints, short stature, and other symptoms.