Hertwig, Oscar
Oscar Hertwig (ôs´kär hĕrt´vĬkh), 1849–1922, German embryologist. He studied medicine with Haeckel and Gegenbaur. In 1875 he established the fact that fertilization consists of the union of the nuclei of a male and a female sex cell. He studied the germ-layer theory (introducing the term coelom) and malformations of vertebrate embryos.
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Antheridium , antheridium The male sex organ or gametangium, within which male gametes are formed, in algae, fungi, bryophytes (mosses, liverworts, etc), and pteri… gynandromorph , gynandromorph An animal that possesses both male and female characteristics because it is genetically a mosaic, i.e. some of its cells are geneticall… Luteinizing Hormone , luteinizing hormone (LH; interstitial-cell-stimulating hormone; ICSH) A hormone, secreted by the anterior pituitary gland in mammals, that stimulates… Male , male
1. Denoting the gamete (sex cell) that, during sexual reproduction, fuses with a female gamete in the process of fertilization. Male gametes are… gonad , gonad •ad, add, Allahabad, bad, Baghdad, bedad, begad, cad, Chad, clad, dad, egad, fad, forbade, gad, glad, grad, had, jihad, lad, mad, pad, plaid, r… Cell Theory , Cell theory states that the cell is the basic building block of all life forms and that all living things, whether plants or animals, consist of one…
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Hertwig, Oscar