Gas exchange happens in the spongy mesophyll tissue of the leaf. Spongy mesophyll cells are covered by a thin layer of water and loosely packed. When the plant is photosynthesising during the day, these features allow carbon dioxide to diffuse into the spongy mesophyll cells, and oxygen to diffuse out of it.pongy mesophyll cells are covered by a thin layer of water and loosely packed. When the plant is photosynthesising during the day, these features allow carbon dioxide to diffuse into the spongy mesophyll cells, and oxygen to diffuse out of it.
In biometrics and forensic science, minutiae are major features of a fingerprint, using which comparisons of one print with another can be made. Minutiae include: 1  Ridge ending â the abrupt end of a ridge. 2  Ridge bifurcation â a single ridge that divides into two ridges. 3  Short ridge, or independent ridge â a ridge that commences, travels a short distance and then ends.
Small hyperechoic nodules of the renal parenchyma. Zappasodi F, Sanna G, Fiorentini G, Frassineti C. Twenty-four hyperechogenic nodules ranging from 0.5 cm to 2.5 cm in diameter were observed within the renal parenchyma in 22 patients. Eighteen patients did not complain of renal symptoms, one had microhematuria, one renal colic, and two pain in the right flank. Because of the sonographic features suggesting fat-containing masses, these lesions were considered to be small angiomyolipomas. Two of our patients underwent surgery, which confirmed this histopathologic interpretation.