yolk cell

yolk cell
a giant syncytial uncleaved cell containing the yolk. It underlies the blastodisc early in development and becomes enveloped by the blastoderm during epiboly

Dictionary of ichthyology. 2009.

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Look at other dictionaries:

  • yolk cell — noun : a nucleated cytoplasmic mass that is derived from the egg nucleus of an arthropod and provides nutriment for the developing embryo …   Useful english dictionary

  • yolk granule — a membrane bounded sac containing yolk. These 50 μm granules are densely packed in the interior of the yolk cell and make up most of the cell …   Dictionary of ichthyology

  • yolk ball — the anterior round region of the yolk cell present after the yolk extension forms during the segmentation period …   Dictionary of ichthyology

  • yolk extension — the posterior elongated region of the yolk cell that forms during the segmentation period …   Dictionary of ichthyology

  • yolk syncytial layer — a peripheral layer of the yolk cell including nuclei and non yolky cytoplasm …   Dictionary of ichthyology

  • 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

  • Cell growth — The term cell growth is used in two different ways in biology. When used in the context of reproduction cells of living cells the phrase cell growth is shorthand for the idea of growth in cell populations by means of cell reproduction. During… …   Wikipedia

  • yolk sac tumor — a malignant germ cell tumor of children that represents a proliferation of both yolk sac endoderm and extraembryonic mesenchyme. It is characterized by a labyrinthine glandular pattern with a papillary projection into a sinuslike space;… …   Medical dictionary

  • yolk — n. [A.S. geoloca, yolk] Stored food substances in the egg cell …   Dictionary of invertebrate zoology

  • yolk — 1. One of the types of nutritive material stored in the ovum for the nutrition of the embryo; y. is particularly abundant and conspicuous in the eggs of birds. SYN: vitellus. 2. Fatty material found in the wool of sheep; when extracted and… …   Medical dictionary

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