The Endocrine System Essay

989 words - 4 pages

The endocrine system is a group of glands distributed throughout the human body. This group of glands secretes substances called hormones. These hormones are dumping into the bloodstream (Shier, Butler & Lewis, 2009). The endocrine system does not have a single anatomic location. It is dispersed throughout the human body. The final purpose of this process is to control, regulate, and coordinate the functioning of the human body. Some body functions can be activated or inhibited by hormones, which are secreted in very small quantities. The hormone related diseases may be due to hyper secretion, or a hypo secretion. The hormones secreted by the endocrine glands regulate growth, development and function of many tissues, and coordinate the body's metabolic processes. An inadequate secretion of hormones may cause disorders in the body, which on occasion result in serious health consequences.
The majors endocrine glands are the pituitary gland, thyroid gland, parathyroid glands, adrenal glands, pancreas, pineal gland, thymus gland, and reproductive glands (Shier et al., 2009). The pituitary gland is situated at the base of the brain. Through hormones secreted by it, controls the operation of major endocrine glands like thyroid, adrenals, reproductive glands and body growth, then an anomaly in capacity of pituitary gland show symptoms that result from a lack of secreted hormones that normally stimulate. In reaction to excess or deficiency of pituitary hormones, the glands affected by these hormones can cause an excess or a deficiency of their own hormones. For example, too much growth hormone can cause gigantism, or excessive growth, and a deficiency can cause dwarfism. On the other hand pituitary gland acts on the stimulation of the thyroid gland to secrete hormones that regulate the body's metabolism, energy, and nervous system activity.
The thyroid is a small gland in the neck, in front of the trachea below the larynx. Thyroid hormones control metabolism, which is the body's ability to break down food and store it for energy, and convert food waste products, releasing energy in the process. Hyperthyroidism (too much hormone) may result Grave's disease. Symptoms include anxiety, rapid heart rate, diarrhea and weight loss, nervousness, anxiety, and irritability.
The parathyroid glands are located in front of the base of the neck around the thyroid gland and secrete parathyroid hormone. Parathyroid hormone regulates blood levels of calcium and phosphorus. This hormone (parathyroid hormone) affects the bones, kidney, and intestine (Shier et al., 2009).
Adrenal glands are endocrine glands that sit atop the kidneys (Shier et al., 2009). The adrenal glands secrete hormones that increase heart rate, the force of cardiac muscle contraction, breathing rate, elevate blood pressure and blood glucose level. This activity prepares the body foe energy expending action, sometimes called fight or flight responses (Shier et al., 2009).
According to Shier,...

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