- vitelline follicle
- гельм. желточный пузырёк* * *желточный пузырек
English-russian biological dictionary. 2013.
English-russian biological dictionary. 2013.
animal development — Introduction the processes that lead eventually to the formation of a new animal starting from cells derived from one or more parent individuals. Development thus occurs following the process by which a new generation of organisms is produced by … Universalium
fertilization — fertilizational, adj. /ferr tl euh zay sheuhn/, n. 1. an act, process, or instance of fertilizing. 2. the state of being fertilized. 3. Biol. a. the union of male and female gametic nuclei. b. fecundation or impregnation of animals or plants. 4.… … Universalium
membrane — 1. A thin sheet or layer of pliable tissue, serving as a covering or envelope of a part, as the lining of a cavity, as a partition or septum, or to connect two structures. SYN: membrana [TA]. 2. SYN: biomembrane. [L. membrana, a skin or m … Medical dictionary
Ascidiacea — Taxobox fossil range=fossil range|0|0|earliest=Silurian|text=Recent (but see text) name = Ascidiacea image width = 250px image caption = Halocynthia sp. regnum = Animalia phylum = Chordata subphylum = Urochordata classis = Ascidiacea classis… … Wikipedia
reproductive system, animal — Introduction any of the organ systems by which animals reproduce. The role of reproduction is to provide for the continued existence of a species; it is the process by which living organisms duplicate themselves. Animals compete with… … Universalium
Oocyte activation — Oocyte (or ovum/egg) activation is a series of processes that occur in the oocyte after fertilisation. Sperm entry causes calcium release into the oocyte. In mammals, this has been proposed to be caused by the introduction of phospholipase C… … Wikipedia
Cell — The basic structural and functional unit in people and all living things. Each cell is a small container of chemicals and water wrapped in a membrane. Each cell in the human body there are 100 trillion cells in each of us contains the entire… … Medical dictionary
List of cutaneous conditions — This is an incomplete list, which may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. See also: Cutaneous conditions, Category:Cutaneous conditions, and ICD 10… … Wikipedia
egg — egg1 eggless, adj. eggy, adj. /eg/, n. 1. the roundish reproductive body produced by the female of certain animals, as birds and most reptiles, consisting of an ovum and its envelope of albumen, jelly, membranes, egg case, or shell, according to… … Universalium
sac — 1. A pouch or bursa. SYN: saccus [TA]. SEE ALSO: sacculus. 2. An encysted abscess at the root of a tooth. 3. The capsule of a tumor, or envelope of a cyst. [L. saccus, a … Medical dictionary
human embryology — ▪ biology Introduction the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth. The human body, like that of most animals, develops from a single cell produced by the union of… … Universalium