What is gonopore in Ascaris?
Each spicular pouch secretes and houses a club-shaped spicule or penial seta enclosed in a spicular sheath and it consists of a cytoplasmic core surrounded by the thick cuticle. The spicules help in opening female gonopore during copulation. Sperms of Ascaris are the tail, asymmetrical and amoeboid.
What is the function of gonopore?
Gonopore is the genital pore in some invertebrates and especially some insects. The position of gonopore differs in different organisms. The role of reproduction is to provide continue existence of species. So function of gonopores to carry out reproduction.
What is insect gonopore?
: a genital pore in some invertebrates and especially some insects.
Do crayfish have separate sexes?
The normal crayfish reproduction strategy is gonochorism where each individual has only one sex: male or female. The gonads, testis or ovary, whose size and appearance depend on the age and reproductive cycle of the individuals, lie dorsally in the thorax between the layer of the pericardial sinus and the hindgut.
What is female gonopore in cockroach?
The female gonopore is an aperture in the 8th sternum, which lies inside the genital chamber inflected above the 7th sternite. The 7th sternite is also produced backwards into two large oval gynovalvular plates or apical lobes. The genital pouch is also referred to as gynatrium.
What is the meaning of Gonophore?
A gonophore is a reproductive organ in Hydrozoa that produces gametes. It is a sporosac, a medusa or any intermediate stage. The name is derived from the Greek words γόνος (gónos, that which produces seed) and -φόρος (-fóros, -bearing).
What is female Gonophore?
More specifically, in the unmodified female it is the opening of the common oviduct, and in the male, it is the opening of the ejaculatory duct. The position of the gonopore varies considerably between groups, but is generally constant within groups, allowing its position to be used as a “segmental marker”.
Can you keep male and female crayfish together?
They may well be fine together for long periods, but there is always a chance that one will kill the other, especially if it takes advantage of one that has just molted. But I’m not an expert, I’ve just always kept my larger crayfish separate from others of their kind.
Is ejaculatory duct in cockroach paired?
The cockroach has a segmented body that is divided into three different parts- head, thorax, and abdomen. The male reproductive system of Periplaneta consists of a pair of testes, a pair of vasa deferentia, and ejaculatory duct, a pair of seminal vesicles, a mushroom-shaped gland, and a phallic gland.
What are Chitinous asymmetrical structures surrounding the male gonopore called?
The external genitalia are represented by male gonapophysis or phallomere (chitinous asymmetrical structures, surrounding the male gonopore). The sperms are stored in the seminal vesicles and are glued together in the form of bundles called spermatophores which are discharged during copulation.