
Explanation of iodine (noun) form plural: iodines trace element with the chemical symbol I
Sample of iodine Iodine is needed to make thyroid hormones.
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Explanation of blastocyst (noun) form: no plural the ball of stem cells that develop after a fertilized embryo divides is called a blastocyst
Sample of blastocyst The blastocyst implants into the uterine wall seven days after fertilization.
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Explanation of biceps (noun) form plural: bicepses muscle on the upper arm that moves the elbow
Sample of biceps Biceps is the main muscle that helps the arm to lift objects.
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Explanation of ecology (noun) form: no plural the relationships between all communities of living organisms and their environment
Sample of ecology An ecologist knows all about ecology.
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Explanation of respiratory system (noun) form plural: respiratory systems the lungs and airways which are involved in gas exchange
Sample of respiratory system The respiratory system helps maintain the acid-base balance of the blood as well.
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Explanation of steroid (noun) form plural: steroids molecule containing four rings of carbon atoms
Sample of steroid Hormones, some vitamins and cholesterol are steroids.
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Explanation of pupil (noun) form plural: pupils opening in the iris allowing light to pass through to the retina
Sample of pupil Pupils dilate in dark environments to let in more light.
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Explanation of insecticide (noun) form plural: insecticides a chemical used to kill insects
Sample of insecticide Insecticides may be toxic to humans.
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Explanation of portal system (noun) form plural: portal systems system of blood vessels starting and ending in capillaries
Sample of portal system In the portal systems blood flows through two capillary beds prior to returning to the heart.
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Explanation of myelin sheath (noun) form: no plural this is a layer of Schwann cells which covers the nerve axon
Sample of myelin sheath The myelin sheath is an electrical insulator.
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