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Micromere


Micromeres
[Gr. micro - small; Gr. meros - part]. Small blastomeres found in the animal hemisphere during unequal cleavage of a zygote. They are the most actively dividing cells.
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micromere The smallest size class of blastomeres in a cleaving embryo when the blastomeres differ in size from one another.
micron (m) One one-thousandth of a millimeter; about 1/25,000 of an inch. Now largely replaced by micrometer (mm).
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micromeres - small blastomeres; in the sea urchin embryo, the four small cells that result from the fourth cleavage of the vegetal tier of cells (half the cells resulting from that tier's cleavage).
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micromere
Any of the small blastomeres formed at the animal pole of a developing egg. These eventually give rise to the ectoderm.
Covered in Lab 14 Gametogenesis and Development ...
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blastomere exhibiting a size intermediate between a macromere and a micromere.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
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