The pleurae are serous membranes, which mean they secrete a lubricating fluid, called serous fluid.
胸膜为浆膜,这意味它们可以分泌润滑液体,即浆液。
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But of course it's much more than just a storage tank — it's lined with the same four main layers found through most of the GI tract — the mucosa, submucosa, muscularis externa, and serosa — but it's got a few special modifications.
当然,它不仅仅是一个储存罐。它内衬着与大部分胃肠道同的四个主要层——粘膜、粘膜下层、外肌层和浆膜——但它有一些特殊的修改。