Human Body Systems

Artery

A blood vessel that carries blood away from the heart is called an artery. Arteries are like tubes that transport oxygen-rich blood from the heart to different parts of the body.

Capillary

A tiny blood vessel that allows the exchange of gases, nutrients, and waste products. Capillary. A capillary is a small blood vessel where oxygen and nutrients from the blood pass into body tissues and waste products pass back into the blood.

Circulatory system

The system of the heart, blood, and blood vessels, it moves oxygen, nutrients and waste. Circulatory system. The circulatory system is the body's transport network that moves blood, bringing oxygen and nutrients to cells and removing waste products.

Diffusion

The movement of molecules from an area of higher density to an area of lower density. Diffusion. It is a process where particles spread out evenly in a space from where there are more of them to where there are fewer.

Digestive system

The system of organs that breaks down food into nutrients for use by the body. Digestive system. The digestive system is like a food processor in your body that turns what you eat into energy and nutrients.

Esophagus

The muscular tube connecting the mouth to the stomach. Esophagus. The esophagus is the tube in your body that carries food from your mouth to your stomach.

Kidney

The organ that filters water and waste from blood kidney. The kidney is a bean-shaped organ that cleans your blood by removing waste and extra fluids, creating urine.

Large intestine

The organ that removes water from undigested food. Large intestine. The large intestine absorbs water and forms waste for elimination from the body.

Muscular system

The organ system made up of muscles that help the body move. Muscular system. The muscular system is a network of tissues that enables movement of the body and maintains posture.

Nervous system

The brain, spinal cord and nerves which relay information. Nervous system. The nervous system is like the body's electrical network that sends messages between the brain and the rest of the body to control and coordinate actions.

Respiratory system

The organs that transfer oxygen from the air to the body, like the nose, trachea, and lungs. Respiratory system. The respiratory system helps you breathe by taking in oxygen and removing carbon dioxide from your body.

Skeletal system

All the bones in the body that support it, help it to move, and protect internal organs. Skeletal system. The skeletal system is the body's structure made of bones that provides support and protection.

Small intestine

The long organ where most food digestion occurs, it connects to the stomach. small intestine. The small intestine is a tube-like organ where most nutrients from food are absorbed into the body.

Urinary bladder

The muscular sac-like organ that stores urine. Urinary bladder. The urinary bladder is a stretchy organ in the body that holds urine until you're ready to go to the bathroom.

Vein

A blood vessel that carries blood to the heart. Vein. Veins are tubes in the body that transport blood back to the heart.