elimination
Achlorhydria
Objective is the medical term meaning without emotion.
Wernicke's encephalopathy is the medical term meaning degenerative brain disorder caused by lack of thiamine.
Hypocapnia is the medical term meaning a deficiency in carbon dioxide levels in the blood. This can occur due to hyperventilation or certain medical conditions affecting lung function.
atrophy
Medically, it would be called "gastric hypo-acidity", but I've never heard of it being a problem. The opposite, "gastric hyperacididty is a common problem. The lack of hydrochloric acid in the stomach is achlorhydria
Clubbing is the medical term for the changes in fingernails or toenails associated with chronic lack of oxygen.
Anesthesiologist
If you are referring to lack of or poor muscle tone then "hypotonia" is the correct medical term for low tone, and "atony" for absent tone.
Agenesis is the medical term meaning absent development of an organ or tissue. Atresia is the medical term meaning congenital absence or development of a tube.
Encopresis is the medical term meaning incontinence of stool. If the patient has never had bowel control, this condition will be called primary encopresis.
Hypochromia (as in hypochromic anemia) is the medical term meaning deficiency in hemoglobin.