主要内容 Main Content 腹膜与腹膜腔 The Peritoneum and Peritoneal Cavity 结肠上区 The Supracolic Compartment

一、原始心血管系统的建立 二、心脏的发生

一、泌尿系统的发生 1、肾、输尿管：来自间介中胚层 2、膀胱、尿道：来自尿生殖窦（内胚层）

一、原始消化管的形成和分段 第4周，胚盘卷褶，卵黄囊入胚体内，形成原始消化管

一、鳃器的发生 鳃器：是鳃弓、鳃沟、咽囊和鳃膜的总称

１．畸形学的概念 ２．畸形的成因 ３．畸形的分类 ４．致畸敏感期 ５．畸形的预防和治疗

一、神经管和神经嵴的发生及早期分化 1、神经管和神经嵴的发生

(1) extra-embryonic blood vessels ---blood island: at the middle of 3 rd week, wall of the yolk sac mesenchyma proliferate and form isolated cell clusters, the peripheral cell become flattened and differentiate into endothelial cell to from endothelial tube; central located cells are detached and develop into primitive blood cells(blood stem cell)

digestive and respiratory system derived from primitive gut /foregut /midgut /hindgut ---epi. of digestive and respiratory system derived from endoderm ---CT and MT of digestive and respiratory system derived from splanchnic or visceral mesoderm

---a science which study the processes and regulations of development of human fetus.(from 1 cell(zygote) to (5-7)X1012 cells ) ---total 38 weeks: preembryonic period: before 2 weeks