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- Allergens, like pollen, are nothing more than foreign plant antigens. When they get released into the air, you can see and hear the result.When allergens ...
- The average adult has about 6 pounds of skin covering 18 square feet, making skin the body's largest organ. Let's look at how the skin is put together. ...
- The two lungs are the primary organs of the respiratory system. They sit to the left and right of the heart, within a space called the thoracic cavity. ...
- Brain tissue is supplied with oxygen and nutrients by a network of cerebral arteries. If the wall of an artery becomes weak, a portion of it may balloon ...
- Most cataracts are age related. They show up as a cloudy area in the lens.
- Ouch!!! Gotcha! Pain, although often uncomfortable, is a protective mechanism that alerts us to potential or actual harm to the body's tissues. Here, ...
- For the first 12 hours after conception, the fertilized egg remains a single cell. After 30 hours or so, it divides from one cell into two. Some 15 hours ...
- Air enters the body through the mouth or nose and quickly moves to the pharynx, or throat. From there, it passes through the larynx, or voice box, and ...
- The glands that make up the endocrine system produce chemical messengers called hormones that travel through the blood to other parts of the body. Important ...
- Malignant tumors, as seen developing on the right vocal cord, are typically caused by tobacco use.