<prompt> Which of the following is derived from ectoderm?Epithelium of irisCiliary musclesVascular endotheliumSclera  <response>: Some epithelia derived from ectoderm- the epithelium of the skin , hair follicles, sweat glands, sebaceous glands, and mammary glands - the epithelium over cornea and conjunctiva, external acoustic meatus and the outer surface of the tympanic membrane- the epithelium of some pa of the mouth, the lower pa of the anal canal, terminal pa of the male urethra, pas of the female external genitaliaRef: Human Embryology; Inderbir Singh; Tenth Edition; Page No: 95 