Filmatheque Pathé-Baby (1931)

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CLASSE III. HISTOIRE NATURELLE 1 100. VEGETAUX VUS AU MICROSCOPE. Tranches minces des differentes parties d'un vegetal. — Le microscope. — La cellule vegetale : mouvement du protoplasme. — Cellule vivante se divisant. — Croissance d'un vegetal (vitesse acceleree). 1101. LA VIPERE. Type des serpents venimeux. La vipere en reptation. Tete de vipere rouge. Crane (dents en crochets). Comment fonctionnent les glandes a venin (dessins animes). Differenciation de la vipere et de la coi'leuvre. Vipere du Gabon. La vipere est ovovivipare. 1 102. DEVELOPPEMENT DES (EUFS D'OURSIN. Film montrant tres nettement toutes les phases du developpement des ceufs d'oursin. — Cellule unique. — Cellules nombreuses contenues dans la membrane. — Differenciation des organes. — Larve d'oursin. 1 105. — LES VORTICELLES (infusoires des eaux stagnantes). Les vorticelles ressemblent a des fleurs microscopiques constamment en mouvement. Les « petales » representes par une couronne de cils vibratiles determinent un tourbillon qui amene a 1'infusoire les particules vegetales dont il so nournt. 78