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The following placental elements were evaluated: decidua, spongy layer and placental chorionic villi.
fibrous layer absent; sclerotesta verrucose; spongy layer absent.
Yet when they tried to pare that layer further, oxygen corrupted the underlying silicon, creating a spongy layer of silicon dioxide beneath the STO.
This breaks down the spongy layer just under the skin called collagen.
Without a complex of tree branches to slowly drip down, a spongy layer to soak into, raindrops land on the side of a building or on a parking lot and stream straight to the gutter.