hilum
The term that refers to the covering on an organ is Visceral.
Lavage
An organ is made of tissues that work together.
Electron
enlargement
prion
Introitus is the medical term meaning entrance.
It is a barrier meant to regulate entrance and exit, and also to impose property. Sometimes called a "stakewall" at some places. It is also used for defensive structure and purposes.
The term that refers to the covering on an organ is Visceral.
Prolapse is the term meaning dropping of an organ.
The medical term for appendages or accessory structures of an organ is "adnexa".
parenchymal: essential, distinctive cells of an organ.
Uterus
Lavage
hypoplasia
The medical term for "away from an organ" is "distal." It refers to a structure that is farther away from a point of reference on the body.
The outer section of an organ can be called its cortex.