In the human body, health is maintained through the interconnectedness of organ systems, proper posture, and stable biochemical metabolism.
An adrenaline rush occurs during a fight-or-flight reaction, which involves the brain, nervous system and adrenal glands. The reaction prepares the body for a short-term burst of strenuous physical activity.
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Hormonal and other changes that occur in the latter half of the menstrual cycle often trigger physical and emotional symptoms that signal your period is coming.
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The coexisting symptoms of headaches and aching ears occur with diverse conditions commonly involving the ears, sinuses, jaw joints or uppermost spine.
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The brain is the primary controller of respiratory rate. It receives input from sensors that detect oxygen and carbon dioxide levels in the blood. Blood pH -- a reflection of its relative acidity or alkalinity -- also influences respiratory rate.
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When you go to the doctor, she checks your heart rate by feeling your pulse. With each beat of the heart, a wave of blood is pushed from the heart into the circulation. These waves can be felt as pulsations in arteries close to the skin surface, such as those in the wrist and neck.
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Solid mineral crystals in your bones impart them with the strength and rigidity to support your body and withstand powerful physical stresses. Calcium and phosphorus are the most abundant minerals in your bones, together forming calcium phosphate crystals.
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Physiology encompasses the tissue, organ and cellular functions of the human body. An optimally healthy body has normal physiology. Conversely, human disease represents an aberration in normal physiology--something in the body fails to function as it should.
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The junction where two bones meet is a joint, also known as a bony articulation. With more than 200 bones in the human body, there are several different types of joints that give the body both mobility and stability. Joints are divided into three groups: freely movable, slightly movable, and immovable.
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The lining of your respiratory system, extending from your nose through the airways of your lungs, is coated with mucus. This clear, sticky substance helps keep the airways clean by capturing particles and chemicals from the air you breathe.
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It probably happened when you were just a kid -- the first time you noticed that corn looks remarkably similar passing from your body as it did going in.
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