Ceruminous glands are modified
Cailaginous pa of an external auditory meatusThe skin covering it is thick and has ceruminous glands (modified apocrine sweat glands), pilosebaceous glands and hair. Since hair is confined to cailaginous pa, furuncle is seen only is the outer third of the canal.Ref: PL Dhingra, Diseases of Ear, Nose & Throat, 7th edition, pg no. 3
Eccrine glands
Apocrine glands
Sebaceous glands
Holocrine glands
Nose and paranasal sinuses