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Updated: June 18, 2025
What then is the role that this gland plays? Like Cowper's glands, it secretes only during sexual excitement. Under such excitement its ducts become gorged with a secretion peculiar to it and at the moment of the emission or the ejaculation of the semen the numerous ducts empty their contents into the urethra to be mingled with and made a part of the semen.
Sheep are the most common hosts for this parasite. It is present in the gall ducts and livers, and causes a disease of the liver known as liver rot. The head portion is conical. It has an oval and ventral sucker, and the body is covered with scaly spines. The eggs are oval and brownish in color.
Brown-Sequard, in his address before the Medical Faculty of Paris in 1869, was the first to suggest that glands, with or without ducts, supplied special substances to the blood which were useful or necessary to the normal health, and in 1889 at a meeting of the Societe de Biologie he described the experiment he had made upon himself by the injection of testicular extract.
When taken into the digestive tract of the animal grazing over infested ground, the immature flukes are freed by the digestive juices. They then pass from the intestine into the bile ducts. The period of development varies from ten to twenty weeks; each sporocyst may give rise to from five to eight redia and each redia to from twelve to twenty cercaria.
As I pointed out in my Sexual Dimorphism , the common characteristic of somatic sexual characters is their adaptive relation to some function in the sexual habits of the species in which they occur. All other differences, therefore, including genital ducts and copulatory or intromittent organs, are somatic.
What connection is there between a sad idea and this limpid, salt liquid, filtered through a little gland at the external corner of the eye, which moistens the conjunctiva and the small lachrymal points, whence it descends into the nose and mouth through the reservoir called the lachrymal sack and its ducts?
The ovary is not only an organ for the formation of the ova, but is also designed for their separation when they reach maturity. FALLOPION TUBES. These are the ducts that lead from the ovaries to the uterus. They are entirely detached from the glands or ovaries, and are developed on both sides of the body.
Even the prickly-pear, or fruit of the cactus, will support a Barbary village for three months. It is, therefore, not surprising the Irish peasant may live on potatoes and milk the greater part of the year. New shoots spring up all over the oases, but particularly in those places where water is abundant, and within and about the ducts of irrigation.
The seminal vesicles possess glandular walls and secrete the substance which they contain, no part of the secretion of the testes normally finding its way into the vesicles. There are numerous gland ducts which collecting the secretion of the prostate gland open into the urethra in the prostatic portion.
When this time comes, the bird seeks her nest, and the egg is laid or born, and lies warm and living, like a jewel in the nest. It is hardly necessary to add that the fertilizing cells in the male bird have an origin similar to that of the ova. The testicles and their ducts are too small to be easily seen in the young bird and in the winter-time, but can be seen during reproductive activity.
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