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Body Systems

The human body is a fascinating, efficient machine that requires the cooperation of different functional and anatomical body systems. Some organs or tissues belong to more than one body system, as they perform a variety of biological functions. Physical health is dependent on physiological balance (homeostasis), which is only possible when all the body’s systems are functioning properly. Essential oils and lifestyle habits can support healthy coordination and operation of the body’s systems. Select one of the body systems listed below to view related doTERRA Science articles.

Cardiovascular System

The heart and blood vessels circulate blood throughout the body, collecting, transferring, and distributing nutrients and waste.

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Digestive System

The teeth, tongue, salivary glands, esophagus, stomach, and intestines are a series of structures that break down food to harvest essential nutrients. The pancreas, liver, and gallbladder produce and secrete digestive enzymes that optimize the digestion and absorption process.
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Integumentary System

The skin, hair, and nails are exterior body structures that help protect internal organs from injury and external threats.

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Excretory System

Metabolic processes that occur throughout the body continually generate waste by-products. The body has developed a variety of ways to expel unwanted or harmful chemicals.

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Endocrine System

Glands throughout the body (hypothalamus, pineal, pituitary, adrenal, thyroid, ovaries, and testes) produce chemical messengers, otherwise known as hormones. These hormones regulate many, if not all, body functions, including body temperature, blood pressure, reproduction, and development.
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Immune System

The skin acts as a barrier, preventing harmful microbes from entering the body. Lymph structures and the spleen filter the blood and body fluids for bacteria and other unfamiliar cells. When these systems fail due to injury or exposure, a collection of white blood cells organize the attack and removal of the pathogens while also facilitating the healing process.
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Musculoskeletal System

Bones provide support, a structural framework for tissues and muscles to attach to, and protection to vital organs. Skeletal muscles relax and contract to make movement possible.

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Nervous System

Networks of nerves throughout the body relay sensory information about the environment to the brain. The brain and spinal cord transmit nerve impulses to various body systems to coordinate voluntary and involuntary action. Memory, emotion, learning, and other higher level thinking processes are products of the brain’s neural network and structure.
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Respiratory System

Air travels through respiratory passages like the mouth, nose, larynx, and trachea to eventually reach the lungs. Gas exchange, the absorption of oxygen and release of carbon dioxide, takes place in spongy peripheral lung sacs termed alveoli.

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