The archegonium is the female reproductive organ, which produces eggs.    From Wordnik.com. Reference

As in the liverworts the young embryo is completely covered by the growing archegonium wall.    From Wordnik.com.  [Elements of Structural and Systematic Botany For High Schools and Elementary College Courses] Reference

The young sporogonium is protected by a thick calyptra derived from the tissue of the thallus around the archegonium.    From Wordnik.com.  [Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria"] Reference

Finally the pollen tube penetrates down to and through the open neck of the archegonium, until it comes in contact with the egg cell.    From Wordnik.com.  [Elements of Structural and Systematic Botany For High Schools and Elementary College Courses] Reference

The first wall in the embryo is nearly at right angles to the axis of the archegonium and divides the egg cell into nearly equal parts.    From Wordnik.com.  [Elements of Structural and Systematic Botany For High Schools and Elementary College Courses] Reference

If a ripe archegonium is placed in water, it soon opens at the top, and the contents of the canal cells are forced out, leaving a clear channel down to the egg cell.    From Wordnik.com.  [Elements of Structural and Systematic Botany For High Schools and Elementary College Courses] Reference

The first divisions of the fertilized egg cell resemble those in the moss embryo, except that the first wall is parallel with the archegonium axis, instead of at right angles to it.    From Wordnik.com.  [Elements of Structural and Systematic Botany For High Schools and Elementary College Courses] Reference

When very young the archegonium is composed of an axial row of three cells, surrounded by a single outer layer of cells, the upper ones forming five or six regular rows, which are somewhat twisted.    From Wordnik.com.  [Elements of Structural and Systematic Botany For High Schools and Elementary College Courses] Reference

The embryo may be readily removed from the archegonium by adding a little potash to the water in which it is lying, allowing it to remain for a few moments and pressing gently upon the cover glass with a needle.    From Wordnik.com.  [Elements of Structural and Systematic Botany For High Schools and Elementary College Courses] Reference

Just before the spores are ripe, the stalk of the sporogonium elongates rapidly, carrying up the capsule, which breaks through the archegonium wall, and finally splits into four valves, and discharges the spores.    From Wordnik.com.  [Elements of Structural and Systematic Botany For High Schools and Elementary College Courses] Reference

Select the exception.a. Females could only produce one archegonium.    From Wordnik.com.  [Yahoo! Answers: Latest Questions] Reference

When the pollen tube has grown into an archegonium, a sperm cell from the male gametophyte fertilizes the egg.    From Wordnik.com.  [WN.com - Articles related to TV food advertisements promote imbalanced diets] Reference

C, calyptra; ar, neck of archegonium; sg ', foot; sg, capsule.    From Wordnik.com.  [Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria"] Reference