The liver is the main organ situated in the right hypochondrium

the spleen is in the left hypochondriac region

Generally, you wouldn't auscultate the whole abdomen. Just one, or maybe two positions for up to 30 seconds listening for bowel sounds. Hyperactivity could mean infection or toxin present, absence could mean ileus.

The 9 quadrants are:-

* Right hypochondrium * Left Hypochondrium * Epigastric * Umbilicus * Suprapubic * Left Iliac Fossa * Right Iliac Fossa * Left Lumbar * Right Lumbar

Hypochondria originally meant feelings of melancholy or anxiety, since these were believed to originate in a part of the abdomen called the hypochondrium. Its meaning later changed to mean anxiety about illness.

The liver and kidneys filter the blood. The bones produce most of the white blood cells. However, T and B lymphocytes are produced in the lymph nodes and spleen, and the T Cells are also produced and mature in they Thymus Gland. The bone marrow is the part of the bone that produces the cells