extremities

(the furthest point or limit of something or the extreme degree or nature of something)

gland

(an organ in the human or animal body that secretes particular chemical substances for use in the body or for discharge into the surroundings- such as a lymph node)

adrenal glands

(the adrenal glands (also known as suprarenal glands) are endocrine glands that sit at the top of the kidneys. The adrenal gland secretes a number of different hormones which are metabolised by enzymes either within the gland or in other parts of the body. These hormones are involved in a number of different pathways.)

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adrenal glands

(the adrenal glands (also known as suprarenal glands) are endocrine glands that sit at the top of the kidneys. The adrenal gland secretes a number of different hormones which are metabolised by enzymes either within the gland or in other parts of the body. These hormones are involved in a number of different pathways.)

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calcium

(a chemical element,  Calcium is the most abundant mineral in the body. In combination with phosphorus it forms calcium phosphate, the dense, hard material of the bones and teeth. It is an important cation in intracellular and extracellular fluid and is essential to the normal clotting of blood, the maintenance of a normal heartbeat, and the initiation of neuromuscular and metabolic activities.)

cortex

(the outer or superficial part of an organ or body structure such as the kidney, adrenal gland, brain, bone or a hair)

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secrete

(of a cell, gland, or organ- produce and discharge a substance)

endocrine

(of, relating to, or denoting glands that secrete hormones or other products directly into the blood- endocrine system)

hormone

(a regulatory substance produced in an organism and transported in tissue fluids such as blood to stimulate specific cells or tissues into an action, behavior, or mood.)

potassium

(The major positive ion (cation) found inside cells. The chemical notation for potassium is K+. The proper level of potassium is essential for normal cell function. An abnormal increase in potassium (hyperkalemia) or decrease in potassium (hypokalemia) can profoundly affect the nervous system and heart, and when extreme, can be fatal.)

sodium

(salt. it is contained in the fluid surrounding cells in the body. The chemical notation for sodium is Na+. When sodium is combined with chloride, the resulting substance is a crystal called table salt. Excess dietary sodium is largely excreted in the urine, but too much salt in the diet tends to increase the blood pressure. Too much or too little sodium in the blood (called hypernatremia or hyponatremia respectively) can cause cells to malfunction, and extremes can be fatal.)

parathyroid glands

(The parathyroid glands are small endocrine glands in the neck of humans and other tetrapods that produce parathyroid hormone. Humans usually have four parathyroid glands, variably located on the back of the thyroid gland, although considerable variation exists.)

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thyroid gland

(a large cartilage of the larynx, that is a ductless gland in the neck that secretes hormones regulating growth and development through the rate of metabolism.)

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thyroid gland

(a large cartilage of the larynx, that is a ductless gland in the neck that secretes hormones regulating growth and development through the rate of metabolism.)

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