Human Body Systems and Organs

An activity page where kids can trace a figure, measure their own pulse, and compare heart rates to a shrew and a blue whale.

A diagram of the lungs and respiratory system, labeling the trachea, bronchi, and alveoli.

A labeled diagram of the endocrine system, showing the locations of the pituitary, thyroid, thymus, and adrenal glands.

A diagram of the kidneys and urinary system, showing how blood is filtered and waste is processed.

A labeled diagram of the digestive system, showing the path food takes through the stomach, liver, pancreas, and intestines.

A diagram of the human muscular system, labeling major voluntary and involuntary muscles.

A diagram of the immune and lymphatic systems, showing lymph nodes, vessels, tonsils, and types of white blood cells.

A detailed anatomical diagram of the human heart, showing blood flow and circulation pathways.