What are organs?
An organ is made up of different tissues carrying out a joint function.
Humans have five vital organs that are necessary for survival.
These are the brain, heart, kidneys, liver and lungs.
The human brain is the body's control center, that receive and send messages to other organs.
The heart pumps blood around your body.
The kidneys filter that blood in our body and produce urine.
The liver cleans your blood removing waste from your body.
The lungs' main function is to separate oxygen from the air and remove carbon dioxide from the blood.
The stomach helps to digest food.
The skin protects us from bacteria, viruses, infection and other harmful ultraviolet (UV) rays.
The intestines absorb nutrients and minerals found in food.
Organ systems
An organ system is a group of organs working together to carry out particular functions.
Examples of organ systems include the digestive system, the cardiovascular system, the musculoskeletal system, respiratory system, reproductive system, and immune system .
The digestive system includes the stomach and small and large intestines. It breaks down food and absorbs nutrients.
The circulatory system includes the heart, veins, arteries and capillaries. Its function is to transport substances in the blood and around the body where they are needed..
The musculoskeletal system includes bones and different types of muscles. It supports our body and allows movement.
The respiratory system includes the nose, lungs and the trachea. It delivers oxygen and removes carbon dioxide from the body.
The reproductive system includes the uterus and ovaries in women, and the epididymis, penis and testes in men.
The immune system includes bone marrow. It protects the body from infection in a number of different ways.