ans辅助器官(Para.1)anizationofthegastrointestinaltractWhatarethefourlayers?(Concentriclayers)erves(内神经)Thegastrointestinaltract胃肠道Thesubmucosalplexus(Meissnerplexus)黏膜下层神经丛(即迈斯纳神经丛)Themyentericplexus(Auerbachplexus)肠肌神经丛(即奥尔巴赫神经丛)?Thesubserosalplexus浆膜下神经网丛Whatarethethreenerveplexuses?唾液saliva味蕾tastebuds嗅神经olfactorynerves胃液的分泌thesecretionofgastricjuice恒牙permanentteeth咀嚼mastication食管esophagus蠕动peristalsis外层纵向肌outerlongitudinallayersofmuscles内层环形肌innercircularlayersofmusclesMouthandEsophagus口腔和食道1.Threepairsofsalivaryglands1literofsalivaperdaysalivation唾液分泌1.Threepairsofsalivaryglands1literofsalivaperday2.ervoussystem(自主神经系统)controlssalivation.(sympatheticandparasympathetic)(Butnotregulatedbyhormones)salivation唾液分泌
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