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The mammalian female reproductive system contains three main divisions: the vagina and uterus, which act as the receptacle for the sperm, the ovaries, which produce the female's ova, and the vulva, which consists of the labia and clitoris. The vagina, uterus and ovaries are always internal while the vulva is external.
Male northern elephant seals fight fiercely each year. Unsuccessful males may not mate at all, while successful males have harems of 30 to 100 females. In the case of intrasexual selection, adorned males may gain a reproductive advantage without the intervention of female preference. This advantage will be conferred by weapons used in the ...
Lordosis is a reflex action that causes many non-primate female mammals to adopt a body position that is often crucial to reproductive behavior. The posture moves the pelvic tilt in an anterior direction, with the posterior pelvis rising up, the bottom angling backward and the front angling downward.
They have a hindgut fermentation system, and their large and small intestines together reach 35 m (115 ft) in length. Less than half of an elephant's food intake gets digested, despite the process lasting a day. [77] An elephant's bladder can store up to 18 litres of urine [81] and its kidneys can produce more than 50 litres of urine per day. [82]
Most female mammals have an estrous cycle, yet only ten primate species, four bat species, the elephant shrew, and one known species of spiny mouse have a menstrual cycle. [19] [20] As these groups are not closely related, it is likely that four distinct evolutionary events have caused menstruation to arise. [21]
A penis (/ ˈ p iː n ɪ s /; pl.: penises or penes) is a male sex organ that is used to inseminate female or hermaphrodite animals during copulation. [1] [2] Such organs occur in both vertebrates and invertebrates, including humans, but not in all male animals. [3] The term penis applies to many intromittent organs, but not to all.
Their new 88 million Australian dollar ($55 million) home has mud wallows, specially designed elephant barns and a communal sleeping area filled with 3,300 metric tons (3,600 U.S. tones) of sand.
The northern elephant seal (Mirounga angustirostris) is one of two species of elephant seal (the other is the southern elephant seal). It is a member of the family Phocidae (true seals ). Elephant seals derive their name from their great size and from the male's large proboscis , which is used in making extraordinarily loud roaring noises ...