BIOB33H3 Lecture Notes - Lecture 4: Chorionic Villi, Elastic Cartilage, Neural Groove
Biob33 lecture 4 foundations: connective tissues. Chorion has trophoblasts and mesoderm; extends into the endometrium via chorionic villi; body stalk becomes the umbilical cord. Notochord; only present in the development stage, not present in a mature individual, formed in the mesoderm. Melanocyte, sometimes found in the connective tissue; produce melanin free macrophages; same function as fixed macrophages, just able to move around. Mast cells (help stimulate inflammation, involved with the immune system) lymphocytes; directly in the connective tissue, not contained in a vessel like. Wbc and platelets = < 1% of blood. Wbc involved with the immune system; diff types. Hyaline cartilage; located at the ends of some bones; for a smooth movement, synovial fluid/joints, translucent matrix, supports larynx/trachea; lacunae (chondrocytes located), no veins or arteries running thru it. Elastic cartilage; located where there needs to be more flexibility, top of ear, epiglottis, auditory canal, cuneiform cartilages of the larynx, semi solid matrix w/ elastic fibers.