心的胚胎发生.pptVIP

Contents: 1. Early Embryonic Development 2. Formation of Primitive Cardiovascular System 3. Development of Heart ;Sperm（精子） Notochord（脊索） Spermiation（排精） Epiblast（上胚层） Ovum（卵子） Hypoblast（下胚层） Ovulation（排卵） Cytotrophoblast（细胞滋养层） Zygote（受精卵） Endoderm（内胚层） Cleavage（卵裂） Mesoderm（中胚层） Morula（桑椹胚） Ectoderm（外胚层） Blastocyst（胚泡） Primitive streak（原条） Blastocyst cavity（胚泡腔） Amniotic cavity（羊膜腔） Conception（妊娠） Fertilization（受精） Yolk sac（卵黄囊） Angioblastic cord（成血管细胞索） Foregut（前肠） Oropharyngeal membrane（口咽膜） Cloacal membrane（泄殖腔膜） bulboventricular loop（球室袢） Truncus arteriosum（动脉干） Bulbus cordis（心球） Sinus venosus（静脉窦） Bulbus arteriosus cordis（心动脉球） Foramen ovale（卵圆孔） Endocardial cushion（心内膜垫） Atrioventricular canal（房室管） Vitelline veins（卵黄静脉） Pericardial coelom（围心腔） Angioblastic cord（生心索，板） Amnion（羊膜）;Human development is a continuous process, and is customary to divide into prenatal (embryonic development, before birth) and postnatal periods. The prenatal period (embryonic development period) begins at conception or fertilization, the process during which a male gamete or sperm (spermatozoon) unites with a female gamete or oocyte (ovum) to form a single cell called zygote (fertilized ovum), and ends at birth. This process lasts 38 weeks (about 266 days).;The prenatal period is further divided into 3 stages. Pre-embryonic period (1 and 2 weeks after fertilization). The principal developmental changes during this period are fertilization, cleavage, formation of morula, implantation (imbed), and formation of bilaminar germ disc.;Embryonic period (from 3 weeks until 8 weeks). This period is the crucial stage of the embryonic development, because formation of all organ-systems and most developmental defects occur during this period. The early development of cardiovascular system occurs during this period as well. Fetal period (between the ages of 9 and 38 weeks). During this period, except s