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Consists of Cutaneous membrane Epidermis and Dermis Accessory structures Subcutaneous layer Functions of the skin Protection Excretion – sweat and sebum Temperature maintenance – sweating and shivering Nutrient storage – Vitamin D3 synthesis – from the sun Sensory detection – sensations from the outside world Integumentary System Components. Epidermis – composed of layers of keratinocytes […]

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Microbiology Lecture 10-17-19 The search for viruses, Louis Pasteur postulated that rabies was caused by a “living thing” smaller than bacteria(1884), he developed the first vaccine for rabies. Ivanovski and Beijerinkck showed a disease in tobacco was caused by a virus (1890s). 1950’s virology was multifaceted discipline, viruses are non-cellular particles with a defintie size, […]

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Figure 4.5 Date is 10-16-19 Columnar Epithelial – Pseudo stratified ciliated columnar epithelium , Location – Lining of nasal cavity, trachea, and bronchi, portions of the male reproductive tract. Function : protection and secretion. Stratified Columnar Epithelium (multiple layered column cells. Locations – Small areas of the pharynx, epiglottis, anus, mammary gland, salivary glad ducts […]