Endocrinesystem
Endocrine system 1
1.IntrodutionA. Components:(1).Ductless endocrineglandTyroid , Parathyroid,Adrenal gland, HypophysisPineal dody(2). Isolated endocrine cells
A. Components: (1). Ductless endocrine gland 1. Introdution 2 (1). Ductless endocrine gland Tyroid , Parathyroid, Adrenal gland, Hypophysis Pineal dody (2). Isolated endocrine cells
B. Characteristics of the endocrine gland:(1). Cells are arranged as cord , cluster,follicle(2)CapillariesSecretorycells
B. Characteristics of the endocrine gland: (1). Cells are arranged as cord , cluster, follicle (2). Abundant blood capillaries 3
directianofextracellularbloodflow酒hormonefluidEndocrineGlandhormone-producingcellscapillariesTarget tissue or targetorgans?Paracrine secretion:
Paracrine secretion: 4 Target tissue or target organs ®
C.Classification(1).Amino acid-based hormone-secreting cellsEM: numerous secretory granules,Well developed RERand Golgi.Secretion:proteins,peptide,amino acid anolcand derivatives
C. Classification (1). Amino acid-based hormone-secreting cells EM: numerous secretory granules, Well developed RER and Golgi. Secretion: 5 proteins, peptide, amino acid anologs and derivatives