theca cordis


theca

 [the´kah] (L.) a case or sheath. adj., adj the´cal.theca cor´dis pericardium.theca folli´culi an envelope of condensed connective tissue surrounding a vesicular ovarian follicle; it is composed of an internal vascular layer (theca interna) and an external fibrous layer (theca externa).

per·i·car·di·um

, pl.

per·i·car·di·a

(per'i-kar'dē-ŭm, -ă), [TA] The fibroserous membrane, consisting of mesothelium and submesothelial connective tissue, covering the heart and beginning of the great vessels. It is a closed sac having two layers: the visceral layer (epicardium), immediately surrounding and applied to all the heart's surfaces, and the outer parietal layer, forming the sac, composed of strong fibrous tissue (fibrous pericardium [TA]) lined with a serous membrane (serous pericardium [TA]). The phrenic nerves pass to the diaphragm through the anterior pericardium and divide the pericardium into antephrenic and retrophrenic portions; the pulmonary hilum divides both of these portions into suprahilar, hilar, and infrahilar portions. Synonym(s): capsula cordis, heart sac, membrana cordis, theca cordis [L. fr. G. pericardion, the membrane around the heart]

per·i·car·di·um

, pl. pericardia (per'i-kahr'dē-ŭm, -ă) [TA] The fibroserous membrane, consisting of mesothelium and submesothelial connective tissue, covering the heart and beginnings of the great vessels. It is a closed sac having two layers: the visceral layer (epicardium), immediately surrounding the heart, and the outer parietal layer, forming the sac, composed of strong fibrous tissue, the fibrous pericardium, lined with a serous membrane, the serous pericardium.
Synonym(s): heart sac, theca cordis. [L. fr. G. perikardion, the membrane around the heart]