Despite the common names ringworm and dermatophyte, the disease is caused by a fungus, not a worm or plant. Trichophyton, Microsporum, and Epidermophyton are the most common genera that cause ringworm in humans. These organisms feed on keratin, the major structural component of hair, skin and nails.
Thuja occidentalis 'Nigra'. Naturally broad, pyramidal evergreen shrub displays deep green, scalelike needles arranged in flat sprays. New light green needles emerge in spring, deepening in color as they mature. Deep green color adds contrast to winter landscape.
Substantia nigra. The substantia nigra is a basal ganglia structure located in the midbrain that plays an important role in reward and movement. Substantia nigra is Latin for black substance, reflecting the fact that parts of the substantia nigra appear darker than neighboring areas due to high levels of neuromelanin in dopaminergic neurons. It was discovered in 1784 by FÃ©lix Vicq-d'Azyr, and Samuel Thomas von SÃ¶mmerring alluded to this structure in 1791. Parkinson's disease is characterized by the death ...