An Independent Practice Association, or IPA, is an organization comprised of physicians who maintain their independent practices and also join together as an association. The IPA negotiates with organizations, like HMOs, which will supply both patients and income to physicians.
There are 11 major organ systems in the human body, which include the circulatory, respiratory, digestive, excretory, nervous and endocrine systems. The immune, integumentary, skeletal, muscle and reproductive systems are also part of the human body.
This article contains a list of organs of the human body. There are approximately 79 organs, though there is no standard definition of what constitutes an organ and some tissue groups' status as one is debated. 1 Musculoskeletal system.