The outermost region of the kidney is called the

A) adventitia.
B) mucosa.
C) pelvis.
D) cortex.
E) medulla.

Adventitia

The outermost layer of the wall of a blood vessel or other tubular structure, consisting of connective tissue.

Cortex

The outer layer of an organ or structure, such as the cerebral cortex of the brain or the cortex of a plant root or stem.

Medulla

The innermost part of an organ or structure, such as the medulla oblongata in the brain which controls vital body functions.