ANATOMY 1 Lecture Notes - Lecture 20: Lymph Node, Ileocolic Artery, Thyroid
Document Summary
=> swollen glands sacral, ileocolic, mesenteric, + tracheobronchial regions. Lymph nodes widely distributed, but concentrated in neck, axilla, groin, lumbar, Lymphadenopathy = enlarged sometimes tender lymph node. Deep superficial nodes => largest group of nodes in neck, extend from base of skull to root of neck. Drain @ posterior head + neck, auricle, tongue, larynx, esophagus, thyroid gland, nasopharynx, nasal cavity, palate, tonsils. Drain @ posterior scalp + neck, superficial pectoral region, part of arm. + in thorax, upper limbs, abdomen, pelvis, lower limbs. Only ~ 3% of total body weight. Highly organized network of 2 types of cells. Brain + cranial nerves and their branches. Spinal cord + spinal nerves and their branches. Most nerve impulses that stimulate contraction of muscles and secretion of glands originate in cns. Cranial nerves + branches, ganglia, enteric plexuses, sensory receptors link all parts of body to cns. Nerve = bundle of hundreds-thousands of axons (nerve cell fibers) + ct and blood vessels.
