A joint is where two or more bones meet and move together.

Ligaments are tough bands of tissue that connect bones together at joints.

Muscles help you move, support your body, and generate heat to keep you warm.

The cerebral cortex controls thinking, voluntary movements, and sensations like touch, taste, and sight.

A body system is a group of organs that work together to perform a specific function in the body, like the digestive system or the respiratory system.

The three sections of the small intestine are the duodenum, jejunum, and ileum.

Red blood cells typically live for about 3 to 4 months before they are removed from the bloodstream by the spleen and liver.

Voluntary muscles are muscles you can control Involuntary muscles work automatically.

Platelets play a key role in blood clotting, helping to stop bleeding when you get a cut or injury.

Genes carry instructions that determine your traits, like your eye color or height.

Skin protects your body, regulates temperature, and helps you feel things through touch.

The pituitary gland is located at the base of the brain, below the hypothalamus.