Which tissues are considered spongy tissue in the context of vacuum infiltration?

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Multiple Choice

Which tissues are considered spongy tissue in the context of vacuum infiltration?

Vacuum infiltration relies on removing trapped air from porous tissues so that embedding medium can fully penetrate. Tissues with sponge-like architecture—lots of interstitial spaces or air-filled cavities—are especially amenable to this technique because the vacuum can draw the medium into those voids once the air is evacuated. The lungs are the quintessential example, with an extensive network of alveoli that create a highly spongey parenchyma. The placenta also has numerous intervillous spaces and a loose, porous stroma that gives it a spongey character, making it respond well to vacuum infiltration. The other tissues described are denser and less porous. The liver and kidney have more solid, compact parenchyma with fewer open spaces for the embedding medium to fill. Muscle and tendon are dense connective tissues with tightly packed fibers and little porosity. Bone and cartilage are rigid and mineralized, offering limited interstitial spaces for infiltration. In this context, they don’t fit the typical spongey tissue pattern enhanced by vacuum.

Vacuum infiltration relies on removing trapped air from porous tissues so that embedding medium can fully penetrate. Tissues with sponge-like architecture—lots of interstitial spaces or air-filled cavities—are especially amenable to this technique because the vacuum can draw the medium into those voids once the air is evacuated. The lungs are the quintessential example, with an extensive network of alveoli that create a highly spongey parenchyma. The placenta also has numerous intervillous spaces and a loose, porous stroma that gives it a spongey character, making it respond well to vacuum infiltration.

The other tissues described are denser and less porous. The liver and kidney have more solid, compact parenchyma with fewer open spaces for the embedding medium to fill. Muscle and tendon are dense connective tissues with tightly packed fibers and little porosity. Bone and cartilage are rigid and mineralized, offering limited interstitial spaces for infiltration. In this context, they don’t fit the typical spongey tissue pattern enhanced by vacuum.

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