male sperm cell
111Human mitochondrial genetics — is the study of the genetics of the DNA contained in human mitochondria. Mitochondria are small structures in cells that generate energy for the cell to use, and are hence referred to as the powerhouses of the cell. Mitochondrial DNA (mtDNA) is… …
112environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
113microgamete — The male element in anisogamy, or conjugation of cells of unequal size; it is the smaller of the two cells and actively motile. [micro + G. gametes, husband] * * * mi·cro·ga·mete gam .ēt, gə mēt n the smaller and usu. male gamete of an organism… …
114spermatogonium — The primitive sperm cell derived by mitotic division from the germ cell; increasing several times in size, it becomes a primary spermatocyte. SEE ALSO: spermatid. SYN: spermatoblast, spermatogone …
115ovulation — [äv΄yə lā′shən ō΄vyəlā′shən] n. 〚 OVULE + ATION〛 the process by which a mature ovum escapes from an ovary ovulatory [äv΄yo͞olə tôr΄ē, äv΄yələ tôr΄ē; ō΄vyo͞olə tôr΄ē, ō΄vyələ tôr΄ē] adj. * * * See ovulate. * * * …
116ZIFT — Stands for zygote intrafallopian transfer, a method used to treat infertility in which an egg fertilized in vitro (outside the body) is placed into a woman s fallopian tube. This technique is one used to overcome infertility, the inability of… …
117Zygote intrafallopian transfer (ZIFT) — A technique in which a woman s egg is fertilized outside the body, then implanted in one of her fallopian tubes. This technique is one of the methods used to overcome infertility, the inability of couples to produce offspring on their own. First …
118oogenesis — oogenetic /oh euh jeuh net ik/, adj. /oh euh jen euh sis/, n. Cell Biol. the origin and development of the ovum. [1890 95; OO + GENESIS] * * * ▪ physiology in the human female reproductive system (reproductive system, human), growth process …
119seed — Synonyms and related words: Anlage, acorn, affiliation, androcyte, antheridium, antherozoid, apparentation, basis, bed, berry, bird seed, birth, blood, bloodline, branch, breed, broadcast, brood, bud, bulb, cause, children, common ancestry,… …
120seminal fluid — noun the thick white fluid containing spermatozoa that is ejaculated by the male genital tract • Syn: ↑semen, ↑seed, ↑ejaculate, ↑cum, ↑come • Derivationally related forms: ↑ejaculate (for: ↑ …
