The critique extends into nearly every little crevice and lacuna of our civic life. Sometimes one cell is seen in each lacuna , sometimes shortly after cell-division a lacuna may contain two or more cells. And this lacuna has around it certain large round eminences which support the veins and arteries that ascend to the ventricle. This essay is an attempt to fill in a small part of the lacuna.
Derived forms of lacuna
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Doublet of lagoon. Borrowed from Latin lacuna. Compare the inherited doublet laguna. First-declension noun. Compare the inherited lagoa and laguna.
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In histology , a lacuna is a small space, containing an osteocyte in bone,  or chondrocyte in cartilage. The lacunae are situated between the lamellae , and consist of a number of oblong spaces. In an ordinary microscopic section, viewed by transmitted light, they appear as fusiform opaque spots. Each lacuna is occupied during life by a branched cell, termed an osteocyte , bone-cell or bone-corpuscle. Lacunae are connected to one another by small canals called canaliculi. A lacuna never contains more than one osteocyte. Sinuses are an example of lacuna. The cartilage cells or chondrocytes are contained in cavities in the matrix, called cartilage lacunae; around these, the matrix is arranged in concentric lines as if it had been formed in successive portions around the cartilage cells. This constitutes the so-called capsule of the space. Each lacuna is generally occupied by a single cell, but during the division of the cells, it may contain two, four, or eight cells.