superficial layer composed of cuboidal cells Superficial cells are larger than

Superficial layer composed of cuboidal cells

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superficial layer composed of cuboidal cells Superficial cells are larger than basal cells Distinct basal membrane Secretion Ducts of sudoriferous glands, sebaceous glands Developing ovarian follicles in ovaries Stratified Columnar Multilayered arrangement of: Superficial layer : Composed of tall, thin columnar cells Basal layer : Underlying cuboidal- type cells in contact with basement membrane Secretion and movement of materials over cell surface Sometimes ciliated in larynx and nasal surfaces of soft palate Parts of pharynx Urethra Excretory ducts of salivary glands and mammary glands Pseudostratified Columnar Single layer of cells of varying height and shape Nuclei at different levels give false impression of multilayered structure Some may not reach the free surface Protection Secretion Movement of substances across surfaces Ciliated – Trachea, Upper RT Non-ciliated – Most of male reproductive tract (sperm-carrying ducts) Transitional Epithelial Resembles stratified epithelium Shape of surface cells changes (Appear ROUND when unstretched; FLAT when stretched) Basal cells - cuboidal / columnar Surface cells - dome shaped or squamous-like depending on degree of organ stretched
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  • Spring '18
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