Ovum

Definition

noun, plural: ova

(1) Female gamete; female sex cell; female reproductive cell.

(2) Egg cell.


Supplement

In humans, the ovum is the largest cell visible to the naked eye. It is about 0.1 mm in size in humans. It is produced in the ovary and eventually released into the fallopian tube during ovulation. It consists of protoplasm (with some yolk) surrounded by a think cell wall (vitelline membrane). It may also have a noncellular covering (zona pellucida). Within the cell is a large nucleus (germinal vesicle), with a nucleolus (germinal spot). The cell is haploid so that when a sperm cell fertilizes it, it forms a diploid zygote.


Synonyms:

Compare: sperm cell


Please contribute to this project, if you have more information about this term feel free to edit this page



This page was last modified on 17 September 2009, at 07:54. This page has been accessed 43,140 times. 
What links here | Related changes | Permanent link