Definition
The branch of chemistry that deals with the chemical processes and substances that occur within living organisms.
Plain English
The study of the chemistry of life — what living things are made of and the chemical reactions that keep them working.
Context Anchor
Seen in aviation medical and human factors discussions, especially when talking about oxygen use, fatigue, alcohol, medicine, and how altitude affects the body.
Derivation
From Greek bios meaning 'life,' combined with 'chemistry.' Literally, the chemistry of life. Knowing this anchors the term as biology studied at the chemical level.
Why Pilots Care
Pilots don't practice biochemistry, but understanding that body functions depend on specific chemical processes (like oxygen binding to blood) helps explain why altitude, dehydration, and certain medications affect flying ability.
Grounding Statement
In flying, biochemistry is the body’s internal chemistry changing in ways that can affect how well a pilot sees, thinks, and reacts.
Intuition Check
Biochemistry does not mean chemicals carried on the airplane. Here it means the chemical processes happening inside living bodies, including the pilot’s body.
Example Sentence 1
The effects of hypoxia on a pilot are best understood through biochemistry, since the problem begins with how oxygen is carried in the blood.
Example Sentence 2
Biochemistry shows why certain conditions at altitude change how the body processes air.