Life Sciences Glossary: From Endoskeleton to Exoskeleton and Exudate

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Endoskeleton

A skeleton or supporting framework of skeletal connective tissues like cartilage and bone.

Endothermic

Having a constant body temperature maintained by heat produced by own oxidative metabolism.

Enter On

The gut; digestive cavity.

Entropy

A quantity that is the measure of energy in a system not available for doing work.

Environment

The external conditions and influence which affects the life and development of an organism.

Enzyme

A biocatalyst produced by living cells that is capable of speeding up specific chemical and biological reactions.

Epidermis

The superficial vascular layers of the skin.

Epididymis

Part of the sperm duct that is coiled and lying near the testis.

Epiglottis

A flexible flap of cartilage in mammals that covers the glottis, the opening to the respiratory tracts.

Epineurium

The outermost covering around the entire nerve.

Epiphysis

The terminal section of a growing bone, especially long limb bone.

Epistasis

The masking of the phenotypic effect of either or both members of one pair of alleles by gene of a different pair.

Epitope

That part of an antigen recognized by an antigen receptor.

Erythrocytes

Red blood cells.

Erythropoietin

A hormone secreted by the kidneys that stimulates red blood cell production.

Estrogen

Female hormone or estruses producing compound.

Estrus

The period of heat or rut, especially of the female mammal during ovulation.

Ehromatin

Genetic material that is not stained so intensely by certain dyes during interphase.

Eugenics

The application of the principles of genetics to the improvement of humankind.

Eukaryote

Organisms that have nuclei and cell organelles enclosed by membranes.

Explode

An organism or cell having a chromosome number that is an exact multiple of haploid or monopoly (n) .

Eupnea

Normal quiet breathing.

Euryhaline

Able to tolerate wide ranges of saltwater concentrations.

Eurytherms

Able to tolerate wide ranges of temperature; cold – blooded animals.

Eustachian Tube

The tube that connects the middle ear with pharynx.

Evagination

An out pocketing from a hollow structure.

Exocrine

Refers to a gland that is with a duct used to release its secretion.

Exocytosis

A mode of transport of substances out of the cell by enclosure in a vesicle; fusion of the vesicle with the plasma membrane.

Exonuclease

An enzyme that cleaves polynucleotide chains at their ends.

Exoskeleton

A supporting structure secreted by ectoderm or epidermis not made of living tissue.

Exudate

The extravascular fluid containing proteins and cellular debris which accumulates during inflammation.

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