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)

一.一般构成: A.神经元(Neuron)传导电冲动。 B.神经胶质细胞(Neuroglia):有支持作用,并为神经元营造必要的工作环境

骨組織 組成〈細胞一骨細胞 細胞間質/大量力儿义厶塭沈着 (骨基質)膠原線維 無定形物質 骨骨組織 骨膜 力水员 関節軟骨

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

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

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?

概述 組成:抻絡細胞一構造機能O口位 神絰膠細胞 機能 Neuron/興奮在仨達。如理 GLia cell支持、保護、米義

人体内最大的器官。由表皮和真皮构成。参与保护,感觉和体温调节等功能。 1.表皮(Epidemis):角化的复层扁平上皮,由2类细胞构成 A.角化细胞(Keratinocyte):分5层排列,参与皮肤的角化。角化须2~4周完成