What is the content inside antheridium?

What is the content inside antheridium?

The sperm-producing organ, the antheridium, consists of a jacket of sterile cells with sperm-producing cells inside. Antheridia may be sunken (as in the families Ophioglossaceae and Marattiaceae) or protruding. They vary in size from those with hundreds of sperm to those with only 12 or so.

What increases number of cells?

The increase in size and changes in shape of a developing organism depend on the increase in the number and size of cells that make up the individual. Increase in cell number occurs by a precise cellular reproductive mechanism called mitosis.

What does antheridium mean?

: the male reproductive organ of some cryptogamous plants.

What happens when a cell increases in size?

As a cell increases in size the volume of the cell increases more rapidly than the surface area. If a cell gets too large, it would be more difficult to get sufficient amounts of oxygen and nutrients in and waste products out, so the cell has to stop growing before this happens.

How big is the stalk of the antheridiophore?

The stalk is about 1-3cm in length having the dorsiventral surface. The disc of the antheridiophore is eight lobed; the growing points are situated at the apex of each lobe. The upper part of antheridiophore has air chambers alternating with the antheridial chambers.

Which is the terminal part of the antheridiophore?

The antheridiophore is differentiated into long stalk and a terminal disc. The stalk is about 1-3cm in length having the dorsiventral surface. The disc of the antheridiophore is eight lobed; the growing points are situated at the apex of each lobe. The upper part of antheridiophore has air chambers alternating with the antheridial chambers.

What kind of cells are in an antheridium?

An antheridium typically consists of sterile cells and spermatogenous tissue. The sterile cells may form a central support structure or surround the spermatogenous tissue as a protective jacket. The spermatogenous cells give rise to spermatids via mitotic cell division. In some bryophytes, the antheridium is borne on an antheridiophore,…

Which is the reproductive branch bearing the antheridia?

The antheridiophore is the reproductive branch bearing the antheridia. The antheridiophore is differentiated into long stalk and a terminal disc. The stalk is about 1-3cm in length having the dorsiventral surface. The disc of the antheridiophore is eight lobed; the growing points are situated at the apex of each lobe.