chorionic sac

chorionic sac
the sac formed by the vertebrate chorion, surrounding the embryo, amniotic cavity, and amniotic sac and contributing to the fetal part of the placenta.

Medical dictionary. 2011.

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  • chorionic fluid — fluid in the chorionic sac; it is resorbed as the amniotic sac enlarges and fuses with the chorionic sac …   Medical dictionary

  • chorionic villus — one of the threadlike projections growing in tufts on the external surface of the chorion; see primary, secondary, and tertiary v. Chorionic villi covering the entire chorionic sac in an embryo at Carnegie stage 15, about 36 days …   Medical dictionary

  • Chorionic villi — Diagram of a transverse section, showing the mode of formation of the amnion in the chick. The amniotic folds have nearly united in the middle line. Ectoderm, blue; mesoderm, red; entoderm and notochord, black. (Vill …   Wikipedia

  • Chorionic hematoma — (also chorionic hemorrhage) is the pooling of blood (hematoma) between the chorion, a membrane surrounding the embryo, and the uterine wall.[1] With an incidence of 3.1% of all pregnancies[1], it is the most common sonographic abnormality and the …   Wikipedia

  • Chorionic villus sampling — Intervention Model of human embryo 1.3 mm. long. (Villi of chorion labeled at lower right.) ICD 10 PCS 16603 00 …   Wikipedia

  • sac — 1. A pouch or bursa. SYN: saccus [TA]. SEE ALSO: sacculus. 2. An encysted abscess at the root of a tooth. 3. The capsule of a tumor, or envelope of a cyst. [L. saccus, a …   Medical dictionary

  • chorionic vesicle — see under sac …   Medical dictionary

  • Amniotic sac — A drawing of the amniotic sac from Gray s Anatomy …   Wikipedia

  • human embryology — ▪ biology Introduction       the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth.       The human body, like that of most animals, develops from a single cell produced by the union of… …   Universalium

  • pregnancy — /preg neuhn see/, n., pl. pregnancies. the state, condition, or quality of being pregnant. [1520 30; PREGN(ANT) + ANCY] * * * Process of human gestation that takes place in the female s body as a fetus develops, from fertilization to birth (see… …   Universalium

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