Anatomy and Physiology of the Thyroid Gland
The thyroid gland is an endocrine gland found in the neck, and it controls how quickly the body uses energy, makes proteins, and controls how sensitive the body is to other hormones that are in play within the context of the body's intricacies. The gland itself is butterfly-shaped and sits on the trachea, in the anterior neck (Ayoub, Christie, Duggon, and Herndon 725). It is comprised of two lobes connected in the middle by an isthmus, and on the inside contains many hollow follicles, whole epithelial cell walls surround a central cavity filled with a thick, gelatinous material called colloid (Anraku, Nakao, Ono, and Yamamura 319). Located just below the area of the body commonly referred to as the "Adams Apple" or larynx, the thyroid actually originates in the back of the tongue when a body is still in utero and makes its way to the front of the neck through further development before birth.
The normal adult thyroid gland weighs an average of 10 to 20 grams, and it receives its nourishment from bilateral superior and inferior thyroid arteries and a small artery called thyroid ima (Fleseriu and Skugor 162). Located within the body's endocrine system, the thyroid acts in conjunction with the endocrine system, working to maintain communication throughout the body. As the endocrine system is essentially the body's main center for communication to all other areas and functions of the body, the thyroid plays a major role in...
Even though the heart works harder, blockages still shortchange the needed blood supply to all areas of the body. Kidney disorders, which leave extra fluids, sodium, and toxins in the body, obesity, diabetes, birth control pills, pregnancy, smoking, excess alcohol, stress, and thyroid and adrenal gland problems can also cause and exacerbate a high blood pressure condition. Proper ranges of cholesterol are also important in the prevention of heart attack
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S. Congress that the prospects of stem cell research were so vast that it could touch all the realm of medicine (Connor 2000). An unlimited source of embryonic stem cells will solve the problem of shortage of transplants. Embryonic stem cells will save lives by curing generative diseases of the brain, hepatitis, diabetes, leukemia, rheumatoid arthritis, muscular dystrophy and cystic fibrosis and diseases of the heart and kidneys. But current
Human Behavior, Physiology and Freedom What determines exactly where human behavior comes from? Who is the ultimate authority that in effect, evaluates the appropriateness of such behavior? What is freedom and to what extent does behavior influence freedom? What physiological and environmental factors contribute to the assessment of such factors? Is cultural design and the control of freedom and behavior the answer to solving behavioral issues? The answers to these questions are
Cushing's disease, as well as Cushing's syndrome, is caused by the overproduction of something called cortisol. Cortisol is "a normal hormone produced in the outer portion, or cortex, of the adrenal glands" (Margulies). Whether your body naturally overproduces this hormone, or your body receives too much cortisol in steroid medications used as treatment for other diseases, it can lead to development of Cushing's disease. In normal function, cortisol helps the body
2. A functional syncytium a single, enormous muscle cell. 3. The fascia adherens component. 4. The aorta has a tunica media dominated by elastic tissue. The elasticity conferred by elastin allows these elastic arteries to smooth out the sharp changes in blood pressure resulting from the pumping heart. 5. An artery would have a larger lumen than its corresponding vein. With such relatively thin walls, veins tend to appear flattened or collapsed in
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