Lymph and Immune system Identify the following structures and their functions : Models and Dissections Pharyngeal tonsils: in nasopharynx called adenoid when enlarged. Palatine tonsils: in posterolateral oral cavity Lingual tonsils: along posterior one-third of tongue Thymus: involved in T-lymphocyte maturation/ located in mediastinum/ larger in children than adult (grows until puberty, then regresses; gradually replaced by adipose tissue)/ consists of 2 thymic lobes, each surrounded by connective tissue capsule/ Trabeculae of capsules subdivide lobes into lobules (each lobule has outer cortex and inner medullar regions) Thoracic duct: Thoracic duct is largest lymphatic vessel- Run from diaphragm to junction of left subclavian and left jugular veins, saclike cisterna chyli at lts base, drains lymph from left side of head and neck, left upper limb, left side of thorax abdomen, and both lower limbs . Left subclavian vein Cisterna chyli: at the base of the thoracic duct and anterior to the L2 vertebra is a rounded, saclike structure called the cisterna chyli.
- Fall '19
- thoracic duct, cisterna chyli