Organ Systems Body systems are the most complex components of the human body. Each body system contains several organs that perform complex functions. Some systems, such as the nervous, skeletal, and muscular are found throughout the body, while others, such as the digestive, urinary, and endocrine systems are located in smaller areas.






Body Organs Organs are an organization of several different kinds of tissues arranged together to perform special functions. Many organs such as the brain and the kidneys carry out multiple tasks. • The brain controls and coordinates bodily activities and the senses. • The heart pumps oxygenated blood into the body. • The liver filters blood and cleans out toxic waste and acid in the blood. • The stomach helps in the process of digestion. • The kidneys filter blood and remove waste products and excess water from the body. • The lungs pump oxygen and carbon dioxide in and out of our body. • The small intestine absorbs food products. • The large intestine absorbs water and excretes solid waste material. • The skin helps to control body temperature and protects other organs from infection and injury. • The pancreas produces various hormones.


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