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    Blood

    Here are the basics about the life-sustaining fluid called blood.

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    Bones, Muscles, and Joints

    Without bones, muscles, and joints, we couldn’t stand, walk, run, or even sit. The musculoskeletal system supports our bodies, protects our organs from injury, and enables movement.

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    Brain and Nervous System

    The brain controls everything we do, and is often likened to the central computer within a vast, complicated communication network, working at lightning speed.

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    Digestive System

    The digestive process starts even before the first bite of food. Find out more about the digestive system and how our bodies break down and absorb the food we eat.

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    Ears

    Hearing may be the ears’ main job, but it’s not all they do. Learn all about the ears in this Body Basics article.

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    Endocrine System

    The glands of the endocrine system and the hormones they release affect almost every cell, organ, and function of our bodies.

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    Eyes

    The eyes are small compared with most of the body’s other organs, but their structure is incredibly complex. Learn more about eyes, vision, and common problems with both.

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    Female Reproductive System

    Learning about the female reproductive system, what it does, and the problems that can affect it can help you better understand your daughter’s reproductive health.

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    Heart and Circulatory System

    The heart and circulatory system are our body’s lifeline, delivering blood to the body’s tissues. Brush up on your ticker with this body basics article.

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    Immune System

    The immune system, composed of special cells, proteins, tissues, and organs that protect against germs and microorganisms, is the body’s defense against disease.

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    Kidneys and Urinary Tract

    The bean-shaped kidneys, each about the size of a child’s fist, are essential to our health. Their most important role is to filter blood and produce urine.

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    Lungs and Respiratory System

    By the time we’re 70 years old, we will have taken at least 600 million breaths. All of this breathing couldn’t happen without the respiratory system.

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    Male Reproductive System

    Understanding the male reproductive system and what it does can help you better understand your son’s reproductive health.

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    Metabolism

    Brush up on metabolism, the chemical reactions in the body’s cells that change food into energy, in this article.

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    Mouth and Teeth

    Our mouth and teeth play an important role in our daily lives. Here’s a course on the basics – including common problems of the mouth and teeth.

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    Skin, Hair, and Nails

    Our skin protects the network of tissues, muscles, bones, nerves, blood vessels, and everything else inside our bodies. Hair and nails are actually modified types of skin.

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    Spleen and Lymphatic System

    The lymphatic system is an extensive drainage network that helps keep bodily fluid levels in balance and defends the body against infections.

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