Category codes in the ICD-9-CM contain a series of how many digit codes?

The back is the key body area involved in maintaining an upright posture

Indicate whether the statement is true or false.

The meatus is:

A) the tube that carries urine from the kidney to the bladder. B) in a male, the area between the scrotum and the anus. C) the canal through which urine is discharged from the bladder to the exterior of the body. D) an orifice of the urethra.