Life Histories of Animals, Including Man: Or Outlines of Comparative Embryology (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from Life Histories of Animals, Including Man: Or Outlines of Comparative Embryology

Structure and Habits. Haeckel, in 1868,_applied to this group of organisms, which are doubtfully referred to the animal kingdom, the term Monera (from nowy'pnq, simple) in allusion to the extreme simplicity of their structure. Their whole body, he remarks. In a fully developed and freely moving condition, consists of an entirely homogeneous and structureless substance, a living parti cle of albumen, capable of nourishment and reproduction. They differ from the Amoebae, hitherto supposed to be as simple as any organism, in the want of a nucleus and of contractile vesicles. Moreover, they (as in Protamoeba) differ from the Rhizopodous Amoeba in being entirely homogeneous in structure, there being, as Haeckel observes, no apparent difference between a more tenacious outer and a softer inner sarcode mass, as is percep tible in most, perhaps in all, true Amoebae.

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