Immune responses, atrophys w/ age, posterior to sternum, medial to lungs and superior to heart.
scattered throughout the body (600), concentrated near mammary glands, axilla & groin. Filter lymph, trap foreign substances. Macrophages & lymphocutes destroy most foreign substances
left hypochondriac. Most damaged organ in abdominal trauma. Between stomach and diaphram. Destroys worn or defective blood cells & platelets. Stores platelets, attacks foreign substances in blood. If this is removed the red bone marrow and liver will take over.
study of the lungs
main function-gas exchange, take in O2 and eliminate CO2