骨格筋0光顕的構造電顕的構造ヒ機能? 心筋0光顕的構造ヒ電顕的構造機能? 筋節? 三一組? 二一組? 介在板?

1. General features: （1) small number of cells and large amount of extracellular ground substance （2) extracellular is composed of fibers and amorphous ground substance-matrix （3) all of them originate from mesenchyme￾embryonal CT （4) have functions of connection, supporting, protecting, nutrition, defence and repairing

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

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、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

消化腺（Digestive gland） 组成 ： 小消化腺 食管腺 胃腺 肠腺 大消化腺 大唾液腺：腮腺、颌下腺、舌下腺 胰腺 肝 一般结构： 被膜， 叶和小叶，分泌部，导管 功能 ： 化学消化

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）

(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)

① Lymphocyte: a. T-lymphocytes: cytotoxic T cell: Tc C- kill the tumor cell, virus infective cell and foreign cell helper T cell: Th C- promotes activity of BLC and Tc C suppressor T cell: Ts C –regulate the function of BLC and TC

1.General feature: (1) contain more cells and less extracellular ground substance (2) Polarisaton: ---free outer surface: face air or other things ---basal surface: face underlying CT, havebasement membrane (3) Avascularity,but innervation: ---no blood vessels ---rich in nerve terminals