(n.) The male reproductive apparatus in the lower, consisting of a cell or other cavity in which spermatozoids are produced; -- called also spermary.
Example Sentences:
(1) During the development of an antheridium DNA content in manubria gradually increases to 8C-16C level.
(2) This critical moment of spermatogenesis is probably induced by the regulators operating at the level of an antheridium.
(3) In the cytoplasm of the manubria there are numerous secretive vesicles filled with fine-granular substance discharged outside plasmalemma, active Golgi apparatus, well-developed rough ER, numerous polysomes, mitochondria with the condensed structure and plastids with granar and inter-granar thylakoids as well as plastoglobules which increase in number and size along with the development of the antheridium.
(4) It has been assumed that changes in structural organization as well as growth character of shield cells constitute the factor regulating the exchange with external environment, determine light spectrum penetrating to the antheridium and the volume of antheridial space.
(5) The internal space of the antheridium in Chara vulgaris L. is filled with the PAS-positive mucilage which is of pectic nature.
Archegonium
Definition:
(n.) The pistillidium or female organ in the higher cryptogamic plants, corresponding to the pistil in flowering plants.
Example Sentences:
(1) It moves down the neck of the archegonium into the cavity above the egg.