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The male portion of the reproductive tract includes both a short posterior vas deferens and a longer anterior vas deferens. The posterior vas deferens is followed by the prostate, and the anterior vas deferens flows through the haemocoele , an enlarged blastula filled with blood, of the head and opens into a muscular penis which is engulfed in ...
Male mammals ejaculate semen through the penis into the female reproductive tract during copulation. [28] [29] Ejaculation usually occurs after only one intromission in humans, canids, and ungulates, but occurs after multiple intromissions in most mammal species. [30] [31] Copulation can induce ovulation in mammal species that do not ovulate ...
Reproductive tract of a male macropod. Most male marsupials, except for macropods [19] and marsupial moles, [20] have a bifurcated penis, separated into two columns, so that the penis has two ends corresponding to the females' two vaginas. [7] [17] [21] [22] [8] [23] [24] The penis is used only during copulation, and is separate from the ...
The main male sex organs are the penis and the scrotum, which contains the testicles that produce semen and sperm, which, as part of sexual intercourse, fertilize an ovum in the female's body; the fertilized ovum develops into a fetus, which is later born as an infant. The corresponding system in females is the female reproductive system.
Apophallation may be made necessary in order for separation to occur by the partner tightly gripping the penis via a special muscle of the female reproductive tract. [25] Apophallation may benefit the amputator because it prevents the amputee from mating again in the near future, which would result in sperm competition.
The reproductive system of an organism, also known as the genital system, is the biological system made up of all the anatomical organs involved in sexual reproduction. Many non-living substances such as fluids, hormones , and pheromones are also important accessories to the reproductive system. [ 1 ]
There is another benefit for a male kangaroo to have impressive biceps and a muscular chest. It impresses the females. Scientists have learned that female kangaroos are attracted to male kangaroos ...
A male red kangaroo Red kangaroos, Liverpool Plains, Sydney, c. 1819. Kangaroos are marsupials from the family Macropodidae (macropods, meaning "large foot"). In common use the term is used to describe the largest species from this family, the red kangaroo, as well as the antilopine kangaroo, eastern grey kangaroo, and western grey kangaroo. [1]