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Definition of alanine, platelet, hydrocarbon, olefin, dehydration, placenta, fibrous protein, circulate, lacteal, lumen

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Definition of alanine (noun)
form: no plural

an amino acid

Examples
Alanine is a non-essential amino acid.

Definition of alanine
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Definition of platelet (noun)
form plural: platelets

thrombocyte; cytoplasmic body with the function to promote blood clotting

Examples
Platelets do not consist of nucleins and facilitate clot formation.

Definition of platelet
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Definition of hydrocarbon (noun)
form plural: hydrocarbons

compound that is made up of carbon and hydrogen alone

Examples
Important groups of hydrocarbons are the alkanes, alkenes and arenes.

Definition of hydrocarbon
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Definition of olefin (noun)
form plural: olefins

unsaturated open chain hydrocarbons possessing one or more double bonds

Examples
Alkenes are also called olefins.

Definition of olefin
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Definition of dehydration (noun)
form: no plural

the process of passively losing or actively removing water from something

Examples
Exposure to high temperatures can cause dehydration.

Definition of dehydration
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Definition of placenta (noun)
form plural: placentas

the organ that provides nourishment and helps with waste and gas exchange for the developing fetus

Examples
The placenta can produce hormones.

Definition of placenta
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Definition of fibrous protein (noun)
form plural: fibrous proteins

the polypeptide chains making up this protein form straight lines

Examples
Fibrous proteins often have a beta pleated secondary structure which conveys strength.

Definition of fibrous protein
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Definition of circulate (verb)
forms: circulated; circulated; circulating

to move around

Examples
Blood circulates around the body in blood vessels.

Definition of circulate
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Definition of lacteal (adjective)
related to lymph-carrying vessels

Examples
Lacteals lead into the lymphatic system.

Definition of lacteal
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Definition of lumen (noun)
form plural: lumens

internal diameter of blood vessels; hole

Examples
The lumen of arteries is narrowed by arteriosclerosis.

Definition of lumen
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