sexual cell
51egg — The female sexual cell, or gamete; after fertilization and fusion of the pronuclei it is a zygote and no longer an e.. In reptiles and birds, the e. is provided with a protective shell, membranes, albumin, and yolk for the nourishment of the …
52spermatozoon — (n.) (pl. spermatozoa), male sexual cell, 1836, from Gk. spermato , combining form of sperma (gen. spermatos; see SPERM (Cf. sperm)) + zoion animal (see ZOO (Cf. zoo)) …
53Coitus — Sexual union of a male and a female; also called sexual intercourse. Coitus begins when the male inserts his erect penis into the female vagina, a canal leading to the uterus (womb) and fallopian tubes along the sides of the womb. The male then… …
54exogamy — Sexual reproduction by means of conjugation of two gametes of different ancestry, as in certain protozoan species. [exo + G. gamos, marriage] * * * ex·og·a·my ek säg ə mē n, pl mies 1) marriage outside of a specific group esp. as …
55половая клетка — sexual (sex) cell половая клетка. Любая гамета на любой стадии ее развития (от первичной П.к.). (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …
56sex — /seks/, n. 1. either the male or female division of a species, esp. as differentiated with reference to the reproductive functions. 2. the sum of the structural and functional differences by which the male and female are distinguished, or the… …
57endocrine system, human — ▪ anatomy Introduction group of ductless glands (gland) that regulate body processes by secreting chemical substances called hormones (hormone). Hormones act on nearby tissues or are carried in the bloodstream to act on specific target organs… …
58HIV — Classification and external resources Diagram of HIV …
59fungus — fungic /fun jik/, adj. funguslike, adj. /fung geuhs/, n., pl. fungi /fun juy, fung guy/, funguses, adj. n. 1. any of a diverse group of eukaryotic single celled or multinucleate organisms that live by decomposing and absorbing the organic… …
60Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …
