Human Body Systems

A tiny blood vessel where nutrients such as glucose and amino acids enter the bloodstream.

A nutrient that provides the body's main source of energy.

A waste gas produced during cellular respiration.

Muscle tissue found only in the heart that contracts involuntarily.

The smallest unit of life that carries out all life processes.

(CNS)– The brain and spinal cord.

The part of the brain responsible for balance, coordination, and fine motor control.

The largest part of the brain, responsible for thinking, memory, learning, and voluntary movement.

Chemical breakdown of large molecules using enzymes.

A long-lasting disease that usually develops over time rather than being caused by an infection.