Tissues (Epithelium) 2025 PDF

Reminder: Tissue Origins embryonic cells * Video ectoderm endoderm mesoderm https://youtu.be/ 1k5uRkgeV...

Reminder: Tissue Origins embryonic cells * Video ectoderm endoderm mesoderm https://youtu.be/ 1k5uRkgeVAw nervous epithelial connective muscular tissue tissue tissue tissue © D.M. Andrews, 2025  3.4 Epithelial Tissue: Features luminal ALL lumen lumen = = = * ECF/ISF * mitosis = = * avascular = * cell junctions © D.M. Andrews, 2025  3.4 Epithelial Tissue: Features luminal ALL lumen lumen = = = * ECF/ISF * mitosis = = * avascular = * cell junctions Functions: protect, secrete, absorb, sense, excrete, filter, transport, lubricate © D.M. Andrews, 2025  3.5 Surface Epithelium: Classification * covering and lining ALL * use in combination apical cells basal cells * parallels * pseudostratified - varied shapes, single layer function * transitional - varied shapes, stratified © D.M. Andrews, 2025  Tab. 3.1 Simple Squamous ALL * mesothelium Description vs. endothelium Location Function L: glomerular capsule, lungs, blood and lymphatic vessels, heart, serous membranes F: filtration, diffusion, secretion (serous) © D.M. Andrews, 2025  Tab. 3.1 Simple Cuboidal ALL L: kidney tubules, gland ducts, surface of ovaries F: secretion, absorption © D.M. Andrews, 2025  Tab. 3.1 Simple Cuboidal ALL L: kidney tubules, gland ducts, surface of ovaries F: secretion, absorption © D.M. Andrews, 2025  Tab. 3.1 Simple Columnar: non-ciliated * mucin vs. ALL mucus L: stomach to anus, gland ducts F: secretion, absorption © D.M. Andrews, 2025  Tab. 3.1 Simple Columnar: ciliated ALL L: respiratory tract, uterine tubes, uterus, F: move particles, mucus central canal spinal cord, brain ventricles © D.M. Andrews, 2025  Tab. 3.1 Pseudostratified Columnar ALL L: ciliated.. airways of upper and lower F: ciliated.. secretion, move respiratory tract goblet cells mucus non-ciliated.. duct glands, epididymis, non-ciliated.. absorption, male urethra X goblet cells secretion © D.M. Andrews, 2025  Tab. 3.1 Stratified Squamous ALL * keratinization L: epidermis, mouth, tongue, F: protection.. “heavy traffic pharynx, esophagus, vagina areas”, environment © D.M. Andrews, 2025  Tab. 3.1 Stratified Squamous ALL * keratinization death (apical) growth (basal) L: epidermis, mouth, tongue, F: protection.. “heavy traffic pharynx, esophagus, vagina areas”, environment © D.M. Andrews, 2025  Tab. 3.1 Stratified Squamous ALL * keratinization L: epidermis, mouth, tongue, F: protection.. “heavy traffic pharynx, esophagus, vagina areas”, environment © D.M. Andrews, 2025  Tab. 3.1 Stratified Cuboidal ALL L: sweat gland ducts, male urethra, F: protection, some secretion esophageal glands and absorption © D.M. Andrews, 2025  Tab. 3.1 Stratified Columnar ALL L: anus, gland ducts (e.g., esophageal), urethra F: protection, secretion X pharynx © D.M. Andrews, 2025  Tab. 3.1 Urothelium (Transitional) ALL L: bladder, ureters, urethra F: allows distension © D.M. Andrews, 2025  Tab. 3.2 Glandular Epithelium: Endocrine Hormones: ALL cell → ISF → blood → target cells receptors * homeostasis * internal to body © D.M. Andrews, 2025  Tab. 3.2 Glandular Epithelium: Exocrine sudoriferous ALL sebaceous cell → lumen (duct) → “outside” ceruminous e.g., mucus, sweat, wax, digestive ‘juices’, oil, saliva, milk © D.M. Andrews, 2025