All are ectodermal in origin except
Human embryology; 10th edition; Inderbier Singh; Page no 95 Derived from ectoderm Epithelium of skin, hair follicle, sweat gland, sebaceous gland, mammary glandEpithelium over cornea and conjunctiva, external acoustic meatus, outer surface of the tympanic membraneSome pa of the mouth, the lower pa of the anal canal, terminal pa of the urethra, female external genitalia
External acoustic meatus
Anal canal
Sebaceous gland
Bone marrow
General anatomy