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/ˌendōˈkärdēəm/ Noun, pl. endocardia 1. The innermost layer of tissue that lines the chambers of the heart. It underlies the much more voluminous myocardium, the muscular tissue responsible for the contraction of the heart. ( 2. A thin serous membrane that lines the interior of the heart. ( 3. The thin, smooth membrane that lines the inside of the chambers of the heart and forms the surface of the valves. (Google Dictionary) Word origin: endo– + G. kardia,...

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/en·do·cra·ni·um/ (-kra´ne-um) Noun 1. In comparative anatomy is a part of the skull base in vertebrates and represent the basal, inner part of the cranium. The term is also applied to the outer layer of the dura mater in human anatomy. ( 2. The layer between the dura mater and the skull. ( 3. Membrane lining the inside of the skull....

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ˈen-də-krən, -ˌkrīn, -ˌkrēn Adjective 1. Pertaining to internal secretions, hormonal. ( 2. Secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect. ( 3. Of, relating to, affecting, or resembling an endocrine gland or secretion . ( Word origin: Greek Krinein = to...

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Endocrine cell

Noun 1. Secretory cells of the ductless glands. They secrete hormones directly into the blood circulation (internal secretion) to be carried to the target cells. The secreted chemicals can be peptides; steroids; neuropeptides; or biogenic amines....

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/ˈendəˌdərm/ Noun 1. One of the three tissue layers in the embryo of a metazoan animal. Through development, it will produce the digestive system of the adult. ( 2. The innermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the lining of the gut and associated structures. (Google Dictionary) 3. The innermost of the three primitive germ layers of the embryo; from it are derived the epithelium of the pharynx, respiratory tract (except the nose), digestive tract, bladder, and urethra. (Dorland’s Medical Dictionary for Health Consumers.) 4. The inner germ layer that develops into the lining of the digestive and respiratory systems. ( Word origin: From endo- + Ancient Greek δέρμα (derma,...

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