将以下内容总结成3句，并且需要保留关于regulated saliva production的关键信息：Human saliva production is a highly regulated process involving multiple glands and neural pathways. The major salivary glands are the parotid, submandibular, and sublingual glands, which are controlled by the autonomic nervous system to ensure a steady flow of saliva for digestion and oral health. This regulation is crucial for maintaining a balanced oral environment, as both overproduction and underproduction of saliva can lead to significant health issues.
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人类唾液分泌是一个涉及多个唾液腺和神经通路的高度调控过程。主要的唾液腺包括腮腺、下颌下腺和舌下腺，这些腺体受自主神经系统的调控，以确保消化和口腔健康所需的稳定唾液流量。这种调控对于维持口腔环境的平衡至关重要，因为唾液的过量或不足都会导致严重的健康问题。
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