: The primary building block for organic molecules. Hydrogen (10%) : Present in water and all organic molecules.
: Major components of bones and teeth. Major Organ Systems The Human Body
The human body is an integrated, multi-scale system whose stability depends on continuous regulation and adaptation. Health emerges from balanced nutrition, activity, sleep, and avoidance of harmful exposures; disease arises when genetic predispositions, environmental stressors, infections, or aging disrupt homeostatic mechanisms. Ongoing research in molecular biology, genomics, immunology, and regenerative medicine continues to deepen understanding and expand therapeutic possibilities. : The primary building block for organic molecules