The human body requires fuel to function. The breaks down food into glucose, amino acids, and fats. This process begins in the mouth and involves a complex chemical journey through the stomach and intestines.
3. The Life Support Loop: Circulatory and Respiratory Systems The Human Body
6. Regeneration and Growth: The Endocrine and Reproductive Systems The human body requires fuel to function
Attached to this frame is the . With over 600 muscles, this system allows for everything from the powerful stride of a sprinter to the microscopic adjustments of the eye. Muscles operate through a constant cycle of contraction and relaxation, fueled by the energy we consume. 2. The Command Center: The Nervous System The Human Body