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Updated: May 2, 2025
The doctor, after some meditation, theorized in this manner: He concluded that this was the same ball that had carried away the testicle of his young friend, that had penetrated the ovary of the young lady, and, with some spermatozoa upon it, had impregnated her.
There are also certain glands situated in close relation to this duct which provide a fluid which is emitted at the same time as the spermatozoa, the whole being termed the seminal fluid.
When we say that the testes form their external secretion under sexual excitement only, we simply mean that they liberate or release spermatozoa under sexual excitement.
Erotic Intoxication Analogy of Sexual Detumescence and Vesical Tension The Specifically Sexual Movements of Detumescence in Man In Woman The Spontaneous Movements of the Genital Canal in Woman Their Function in Conception Part Played by Active Movement of the Spermatozoa The Artificial Injection of Semen The Facial Expression During Detumescence The Expression of Joy The Occasional Serious Effects of Coitus.
Into this casket, by a secret opening, filmy tubes thrown out by the pollen grains now enticed from their hiding-place on the stamens and clustered on the stigma enter and pour a fertilizing fluid, called "spermatozoa," through a microscopic gateway, which opens in the wall of the egg and leads to its inmost heart.
An abnormal process in the anterior gland, whether of oversecretion or of undersecretion, may interfere with the proper functioning of the posterior gland, the secretion of which is tonic not only to the brain cells, but also to the sex cells. Thus, young animals deprived of the pituitary will not, if male, grow spermatozoa, nor ripe ova in the female.
Absence of, or lack of vitality of the spermatozoa may be determined by microscopic examination of the seminal fluid. The treatment is largely preventive. It is very important that breeding animals be kept in proper physical condition by avoiding the feeding of too heavy or too light a ration, and allowing them sufficient exercise.
BLACK male x YELLOW female BO male YY female | \/ | | /\ | BY female YO male Tortoise-shell female YELLOW male The sex must be determined therefore by the spermatozoa, as in the case of colour-blindness, etc., in man, and the colour factor must always be in the female-producing sperm.
This, it may be remarked, is also the earliest age at which spermatozoa are found in the seminal fluid of boys; before that age the ejaculations contain no spermatozoa, and, as Fürbringer and Moll have found, they may even be absent at sixteen, or later. In female children precocious sexual development is less commonly associated with general increase of bodily development than in boys.
The ova consist of spherical cells, while the spermatozoa resemble an arrow-head in shape. It has not yet been ascertained whether two sexes exist in sponges, or whether the ova and spermatozoa are produced at different periods by the same sponge.
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