Neuropsychiatry Neuropsychiatry is the branch of medicine dealing with mental disorders attributable to diseases of the nervous system. It preceded the current disciplines of psychiatry and neurology, in as much as psychiatrists and neurologists had a common training. The heart is a muscular organ in all vertebrates responsible for pumping blood through the blood vessels by repeated, rhythmic contractions, or a similar structure in annelids, mollusks, and arthropods. Orthopedic surgery or orthopedics (also spelled orthopaedics) is the branch of surgery concerned with conditions involving the musculoskeletal system.

Cardiac The heart is a muscular organ in all vertebrates responsible for pumping blood through the blood vessels by repeated, rhythmic contractions, or a similar structure in annelids, mollusks, and arthropods. The term cardiac (as in cardiology) means "related to the heart" and comes from the Greek ?a?d??, kardia, for "heart." The heart of a vertebrate is composed of cardiac muscle, an involuntary muscle tissue which is found only within this organ. The average human heart, beating at 72 beats per minute, will beat approximately 2.5 billion times during a lifetime (about 66 years). It weighs on average 250 g to 300 g in females and 300 g to 350 g in males.

Orthopaedic Orthopedic surgery or orthopedics (also spelled orthopaedics) is the branch of surgery concerned with conditions involving the musculoskeletal system. Orthopedic surgeons use both surgical and non-surgical means to treat musculoskeletal trauma, sports injuries, degenerative diseases, infections, tumors, and congenital conditions. Nicholas Andry coined the word "orthopaedics", derived from Greek words for orthos ("correct", "straight") and paideia ("rearing" (usually of child)), in 1741, when at the age of 81 he published Orthopaedia: or the Art of Correcting and Preventing Deformities in Children. In the US the spelling orthopedics is standard[citation needed], although the majority of university and residency programs[citation needed], and even the AAOS, still use Andry's spelling. Elsewhere, usage is not uniform; in Canada, both spellings are common; orthopaedics usually prevails in the rest of the Commonwealth, especially in Britain.

Genitourinary In anatomy, the genitourinary system or urogenital system is the organ system of the reproductive organs and the urinary system. These are grouped together because of their proximity to each other, their common embryological origin and the use of common pathways, like the male urethra. Male urogenital development 3D animation: Female urogenital development 3D animation: To gain access to the body, pathogens can penetrate mucous membranes lining the genitourinary tract.