Chapter 6 DIGESTION ABSORPTION §l.Introduction Concept of digestion absorption Mechanical chemical digestion Characteristics of digestive smooth muscles General characteristics Electrophysiological characteristics Resting potential (RP) Slow wave or basic electrical rhythm (BER) Action potential (AP)
Chapter 6 DIGESTION & ABSORPTION § 1. Introduction • Concept of digestion & absorption * Mechanical & chemical digestion • Characteristics of digestive smooth muscles * General characteristics * Electrophysiological characteristics Resting potential (RP) Slow wave or basic electrical rhythm (BER) Action potential (AP)
r5 (T) LO mV 0(P) -35 70- Electrical activities contraction of digestive smooth muscles
Electrical activities & contraction of digestive smooth muscles
Secretion of digestive glands Main functions of digestive fluids Gastrointestinal innervation Intrinsic (or enteric)nervous system Submucosal myenteric plexus Extrinsic nervous system Parasympathetic sympathetic nerves Gastrointestinal hormones General functions Brain-gut peptides
• Secretion of digestive glands * Main functions of digestive fluids • Gastrointestinal innervation * Intrinsic (or enteric) nervous system Submucosal & myenteric plexus * Extrinsic nervous system Parasympathetic & sympathetic nerves • Gastrointestinal hormones * General functions * Brain-gut peptides
U八Rn 黏膜层 點膜肌层 黏摸下层和 环形肌层 肌间神经丛 纵形肌层 传入纤维 浆膜层 交感神经 节后纤维 @ 脊髓传入纤维 迷走神经传入 Intrinsic 和传出纤维 (or enteric) nervous 齐0讲耀 system
Intrinsic (or enteric) nervous system
副交感神经系统 一一一一一交感神经系统 迷走神经 胸段 腹腔神经节 肠系膜下 腰段 神经节 骶段 Extrinsic nervous system
Extrinsic nervous system