simple columnar epithelium. epithelial tissue types.

simple columnar epithelium cell epithelial tissue types tall slender oval nuclei lining organ digestive tract stomach intestines uterus column narrow ciliated non-ciliated glandular respiratory mucus medical membrane connective microvilli absorption secretion protection fallopian tubes neuroepithelium spinal cord ependyma brain cerebro-spinal fluid scientific vector histology cellular structure surface biology anatomy cilia human cells oval-shaped lines organs like epithelium types