粘ねん膜まく下か層そう

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Meanings

1

noun

submucosa

Anatomical term for the layer of connective tissue beneath a mucous membrane.

sticky, glutinous, greasy

膜membrane

下below, down, descend

層stratum, social class, layer

粘ねん膜まく
粘膜 is the mucous membrane itself; 粘膜下層 is the layer directly beneath it.
粘ねん膜まく固こ有ゆう層そう
粘膜固有層 is the lamina propria, a layer within the mucosa; 粘膜下層 lies deeper, beneath the muscularis mucosae.

Compound of 粘膜 (mucous membrane) + 下 (under) + 層 (layer).