Calyx of Held nervous system has allowed for direct research within a mammalian model and the large size increases the ease of electrophysiological recording. For these reasons it has been popular in understanding transmitter release. Specifically, the calyx of Held is used because of: Calyx of Held The Calyx of Held is a particularly large synapse in the mammalian auditory central nervous system, so named by Hans Held in his 1893 article "Die centrale Gehörleitung" because of its resemblance to the calyx of a flower. Globular bushy cells in the anteroventral cochlear nucleus (AVCN) send axons to the contralateral medial nucleus of the
Plant life-form plant functional type, which has recently replaced "life-form" in a narrow sense. Following, some relevant schemes. Based on plant habit: Humboldt described 19 (originally 16) "Hauptformen", named mostly after some characteristic genus or family: Based upon the duration of life and the height of the ligneous stem: Based on the place of the plant's growth-point (bud) during seasons with adverse conditions (cold seasons, dry seasons): Vegetation-forms: Main life-forms ("Grundformen") system: Growth-form system: Main groups of plant life forms: Following, other morphological, ecological, physiological or economic categorizations of plants. According to the general appearance (habit): According to leaf hardness, size and