Glands of the human endocrine system - opinion youHuman Body consists of some of the most complex systems. The glands of the endocrine system in details:. This gland is present in the brain and produces releasing hormone and inhibitory hormone. Hypothalamus regulates the secretions of hormones from the pituitary gland. This gland is present just below the brain and secretes a number of hormones. One of the hormones secreted by the pituitary gland is growth hormone. This growth hormone controls the development of bones and muscles. A person having a deficiency of growth hormone becomes very short and the person having too much growth hormone becomes very tall. The thyroid gland is attached to the windpipe and makes a hormone called thyroxin which contains iodine.
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The adrenal glands have a rich blood supply and experience one of the highest rates of blood flow in the body.
They are served by several arteries branching off the aorta, including the suprarenal and renal arteries. Blood flows to each adrenal gland at the adrenal cortex and then drains into the adrenal medulla.
Adrenal hormones are released into the circulation via the left and right suprarenal veins. The adrenal gland consists of eneocrine outer cortex of glandular tissue and an inner medulla of nervous tissue. The adrenal cortex is divided into three zones: the zona glomerulosathe zona fasciculataand the zona reticularis. Each region secretes its own set of hormones.
The adrenal cortexas a component of the hypothalamic-pituitary-adrenal HPA axis, secretes steroid hormones important for the regulation of the long-term stress response, blood pressure and blood volume, nutrient uptake and storage, fluid and electrolyte balance, and inflammation. ACTH then stimulates the adrenal cortex to produce the hormone cortisol. The adrenal medulla is neuroendocrine tissue composed of postganglionic sympathetic nervous system SNS neurons. It is really an extension of source autonomic nervous system, which regulates homeostasis in the body.
Endocrine System Organs
The sympathomedullary or SAM: Sympathetic-Adrenal-Medulla pathway involves the stimulation of the medulla by impulses from the hypothalamus via neurons from the thoracic spinal cord. The medulla is stimulated to secrete the amine hormones epinephrine and norepinephrine. One of the major functions of the adrenal gland is to respond to stress. Stress can be either physical or psychological or both. Physical stresses include exposing the body to injury, walking outside in cold and wet conditions without a coat on, or malnutrition.]