Plant cell parenchyma cells, that covers the external surfaces of leaves, stems and roots. Several cell types may be present in the epidermis. Notable among these are the stomatal guard cells that control the rate of gas exchange between the plant and the atmosphere, glandular and clothing hairs or trichomes, and the root hairs of primary roots. In the shoot epidermis of most plants, only the guard cells have chloroplasts. Chloroplasts contain the green pigment chlorophyll which is needed for photosynthesis. The epidermal cells of aerial organs arise from the superficial layer of cells known as the "tunica" (L1 and L2 layers)
Out of a Center Which Is Neither Dead nor Alive Out of a Center Which Is Neither Dead nor Alive Out of a Center Which Is Neither Dead Nor Alive is the debut full-length album by Chicago-based post-metal band Minsk. Produced by Sanford Parker, the album was released in 2005 on At a Loss Recordings. In a review of the album, Allmusic's Greg Prato wrote: "Although the group has obvious roots in metal (as evidenced by tracks like 'Narcotics and Dissecting Knives'), Minsk has plenty of tricks up its sleeve, such as the sonic hodgepodge 'Holy Flower of the North Star' (a track custom-made for listening to on headphones)." Phil