I. What’s histology? II. Why we study it ? III. How to study it ?-Histologicalmethods

《组织学与胚胎学 Histology and Embryology》课程PPT教学课件讲稿（英文版）Chapter 05 Blood and Hemopoiesis

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

---skin is the largest organ of the body, it constitutes about 16% of body weight ---its total surface area is about 1.2-2.2 m2 ---function: protection, sensory reception, excretion and thermoregulation

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. Components: ---small gland or endocrine cell: islet of pancreas and corpus luteum ---endocrine gland: Thyroid gland Parathyroid gland Adrenal gland Pituitary gland(hypophysis) Pineal body

---small gland: fundis gland, small intestinal gland ---large gland: salivary gland, pancreas, liver

1. Components ---kidney : produce urine ---ureters ---bladder -cavity organs, conduct, store and ---urethra remove the urine ---functions: remove waste products of metabolism regulate the homeostasis secrete some bioactive factors- renin, erythropoietin

1. Components ---ovary: produce ovum secrete female sex hormones ---oviduct: duct for fertilized ovum(zygote) passing through place where fertilization takes place ---uterus: organ where the fetus grow up ---vagina

---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