His reasoning as to the function of the spermatheca wanted nothing but microscopic evidence of the actual transference of spermatozoa to establish it in all points.
Upon the dorsal wall of the genital pouch the orifice of the spermatheca is situated.
It is a striking proof of the sagacity of Malpighi, that he should have observed in the Silkworm the spermatophore of the male (“in spiram circumvolutum persimile semen”) and the spermatheca of the female.
Locusts and Grasshoppers have the outlet of the spermatheca placed as in the Cockroach; in other European Orthoptera, it lies upon the dorsal wall of the uterus.
The spermatheca is filled during copulation, and is always found to contain spermatozoa in the fertile female.
From the tube a cæcal process is given off, which may correspond with the accessory gland attached to the duct of the spermatheca in many Insects (e.
It is usually stated that the spermatheca of the Cockroach opens into the uterus, as it does in most other Insects, but this is not true.
Fertilization takes place as the egg is laid, the spermatozoa being ejected from the spermatheca of the female and making their way to the protoplasm of the egg through openings (micropyles) in its firm envelope.
The median vagina, spermatheca and ejaculatory duct are, on the other hand, formed by ectodermal inpushings.
Rf, Spermatheca or receptacle of the sperm in copulation, opening into the female duct.
But in rare cases in Helix aspersa a second spermathecais found at the end of this second duct.
Passing on, we find not far from the genital pore a glandular spherical body (the spermatheca c) opening by means of a longish duct into the common duct, and then we reach the pore (fig.
Soon after quitting the uterus it is joined by a long duct leading from a glandular sac, the spermatheca (Rf).
In the large cells this pressure would not take place, and the spermatheca would therefore not open.
Others, again, believe that the queen has perfect control over the muscles that open and close the spermatheca on the vagina; and these muscles are certainly very numerous, complex, and powerful.
In Hyperiodrilus the whole spermatheca is thus included in a corresponding sac, which is of great extent.
Spermatheca rarely with diverticula; sperm ducts as a rule occupying two segments only, usually opening by means of an atrium.
In Heliodrilus the blind extremity of the spermatheca is enclosed in a coelomic sac which is in connexion with the sacs envolving the ovaries and oviducts.
In such other genera of the family as have been examined, the truespermatheca has entirely disappeared, and the sac which contains it in Hyperiodrilus alone remains.
The spermatheca was distended with a perfectly colorless, transparent, viscid liquid, without a trace of spermatozoa.
She sometimes ceases to lay Worker eggs, a considerable time before she dies of old age; the contents of the spermatheca are exhausted; the eggs can no longer be impregnated and must therefore produce drones.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "spermatheca" in a variety of sentences. We hope that you will now be able to make sentences using this word.
