平滑肌 Smooth muscle tissue
（重定向自Visceral muscles）
平滑肌，是非横纹肌的肌肉组织。在人体，平滑肌分布在动脉和静脉血管壁、膀胱、子宫、男性和女性生殖道、消化道、呼吸道、眼睛的睫状肌和虹膜。平滑肌与骨骼肌和心肌在结构、功能、耦合机制、收缩状态等均相异。
平滑肌受自主神经支配，为不随意肌。平滑肌同时也受内分泌系统的间接控制。平滑肌的伸缩源自神经或激素的刺激。
Visceral muscles
中文百科
英语百科
Smooth muscle tissue 平滑肌
（重定向自Visceral muscles）
Smooth muscle is an involuntary non-striated muscle. It is divided into two subgroups; the single-unit (unitary) and multiunit smooth muscle. Within single-unit cells, the whole bundle or sheet contracts as a syncytium (i.e. a multinucleate mass of cytoplasm that is not separated into cells). Multiunit smooth muscle tissues innervate individual cells; as such, they allow for fine control and gradual responses, much like motor unit recruitment in skeletal muscle.
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