BMS 300 Tissues and Skin (Well-enlightened)

tissues correct answers collection of similar cells performing a similar function organs correct answers two or more tissues working in concert ex: skin epithelium tissue correct answers -sheet of continuous cells that form boundaries and surfaces -cells attracted to basal lamina -have an apical and basal side squamous epithelial cells correct answers (flattened) epithelia are found in places where there is an advantage to shortening the diffusion distances such as in regions of gas exchange in the lungs and in the lining of capillaries called the endothelium. cubodial epithelial cells correct answers these epithelia are found in the kidney. Transport of water and salts occurs across this epithelium which you will hear more about in the discussion about excretion. columnar epithelial cells correct answers epithelia are found mostly lining the walls of the stomach, small, and large intestine. The apical surface of these cells is often thrown into a series of folds called microvilli. Each microvillus contains a bundle of actin filaments to give it shape. Some may be ciliated. stratified squamous epithelium correct answers -the type of epithelium found in skin -composed of many layers of epithelia stratum corneum correct answers top layer of epithelia in stratified epithelium that is a horny layer of dead cells filled with keratin stratum granulosum correct answers -second layer of stratified epithelium that is filled with glycolipid vesicles that prevent water from entering stratum spinosum correct answers -third layer of stratified epithelium -called the spiny layer stratum basale correct answers -last layer of stratified epithelium where cell division in epithelium occurs epidermis correct answers -top layer of skin which is made up of keratinocytes dermis correct answers connective tissue proper formed from fibrocytes -lies under the epidermis melanocytes correct answers -pigment synthesizing and secreting cells -has a role in UV shielding -secrete melanin