Home > Uncategorized > Human Anatomy: Lymphatic System

Human Anatomy: Lymphatic System

Today, we’ll hear the Ratfink Lymphatic system lecture. This should be good and at 40 minutes long, fairly cheap.


The lymphatic system conducts excessive fluid from the tissues back into the CV circulation. Filtration and phagocytosis of foreign agents and production of lymphocytes. WBCs are made in the bones.

The tonsils and appendix used to be removed and were thought to have no function.
Lymphatic capillaries to collecting vessels to right lymphatic duct and the left lymphatic duct. The right lympatic duct drains the right quadrant of the body and the left drains the rest.
Lymphatic vessels have thin walls and valves.
Lacteals absorb fats in the intestinal tract. Lymph nodes hold lymphocytes and phagocytes. They are small, round and bean shaped.
White pulp tissue is macrophages + lymphocytes. There are no lymph nodes in the brain.
5 locations have alot of lymph nodes:
cervical, axillary, inguinal, vertebra, mesenteric.
Palpate means to touch of feel the cervival, axillary or inguinal lymph nodes.
Swelling of lymph nodes indicates infection.
The spleen is located in the upper left quadrant of the abdominal cavity. Made of white pulp tissue. Red pulp tissue has large venous sinuses. Blood reservoir is where blood is stored. Destruction of worn out erythrocytes and macrophages.
Thymus – located in the lower neck and mediasinum, atrophies after puberty.
Tonsils – pharyngeal tonsil or adenoid near the nasalphyarnx, oral cavity, tongue, peyer’s patches, appendix.
Lyphedema is obstruction of lymphatic vessels. Caused by elephantasis or radical masectomy.
Autoimmune disease. Rheumatoid arthristis, MS, Myasthemia gravis. In all medical books, they show the absolute worst case.

Tissue: muscle, nerve, connective, epithelial

Epithelial: simple/stratified/pseudo, cuboidal/columnar/squamous

Nucleophile: electrons available, negatively charged, less electronegative

Leaving Group: electron withdrawing, stabilizing, polarizing

Hydrogen Bonding: N 3, O 3.5, F 4, Cl 3

Polar Protic: OH or NH, SN1 reaction,

Intermolecular forces: ionic, hydrogen bonding, dipole dipole, van der Waals

Acetone (CH3)C=O(CH3) 24.2

Ammonia NH3 32.5

Methanol CH3OH 15.2

Ethanol CH3CH2OH 15.9

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