Mature male germ cells derived from SPERMATIDS. As spermatids move toward the lumen of the SEMINIFEROUS TUBULES, they undergo extensive structural changes including the loss of cytoplasm, condensation of CHROMATIN into the SPERM HEAD, formation of the ACROSOME cap, the SPERM MIDPIECE and the SPERM TAIL that provides motility
Spescha, Placidus a, 1752-1833. : Der Mönch und seine Berge : Pater Placidus Spescha (1752-1833) als Pionier und Vertreter des modernen Alpinismus / Manuel Burkhard
Spezifikationssprache : Integrated formal methods : 5th international conference, IFM 2005, Eindhoven, the Netherlands, November 29--December 2, 2005 : proceedings / Judi Romijn, Graeme Smith, Jaco van de Pol (eds.)
2005
1
Spezifikationstechnik : Coordination models and languages : 11th International Conference, COORDINATION 2009 Lisbon, Portugal, June 9-12, 2009 : proceedings / John Field, Vasco T. Vasconcelos (eds.)
2009
1
Spezifische Wärmekapazität : Einstein's other theory : the Planck-Bose-Einstein theory of heat capacity / Donald W. Rogers
A large plant family of the order Asterales, subclass Asteridae, class Magnoliopsida. The family is also known as Compositae. Flower petals are joined near the base and stamens alternate with the corolla lobes. The common name of "daisy" refers to several genera of this family including Aster; CHRYSANTHEMUM; RUDBECKIA; TANACETUM