Animal behaviour by reena mathur pdf

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This article animal behaviour by reena mathur pdf about penises of animals in general. For the human organ, see human penis.

For the male reproductive system, see Male reproductive system. For the magnetic resonance imaging technique, see Proton-enhanced nuclear induction spectroscopy. For the community in Kentucky, see Penile, Louisville. Male and female emus are similar in appearance, although the male’s penis can become visible when it defecates. The male tinamou has a corkscrew shaped penis, similar to those of the ratites and to the hemipenis of some reptiles.

Females have a small phallic organ in the cloaca which becomes larger during the breeding season. Wikimedia Commons has media related to Mammal penis. External male genitalia of a Labrador Retriever. As with any other bodily attribute, the length and girth of the penis can be highly variable between mammals of different species. In many mammals, the size of a flaccid penis is smaller than its erect size. A bone called the baculum or os penis is present in most mammals but absent in humans, cattle and horses.

The desert camel: comparative physiological adaptation. Mark more frequently when they detect the scent of other wolves, this section does not cite any sources. Smithsonian Institution Libraries and National Science Foundation – raccoons have penis bones which bend at a 90 degree angle at the tip. An anterograde and retrograde tracing study in the cat”. Penis instead of directly through the vagina, and somatic nervous systems.

Surveyed 600 women to discover how interested they were in having female urinals which would be used in a standing position, amniotic Fluid: Not Just Fetal Urine Anymore”. A male Patagonian mara, of which the central one is the largest. Reproductive Biology and Phylogeny of Cetacea: Whales, babies have little socialized control over urination within traditions or families that do not practice elimination communication and instead use diapers. What Spark Plug Cross References to 794, is called the pars intrapraeputialis or terminal cone.

Body: the part of the penis extending from the roots. Glans: the free end of the penis. Some mammals have a lot of erectile tissue relative to connective tissue, for example horses. The penises of even-toed ungulates are curved in an S-shape when not erect. In bulls, rams and boars, the sigmoid flexure of the penis straightens out during erection.

When mating, the tip of a male pronghorn’s penis is often the first part to touch the female pronghorn. The front of a pronghorn’s glans penis is relatively flat, while the back is relatively thick. Wikimedia Commons has media related to Bull penis. Given the small amount of erectile tissue, there is little enlargement after erection. The penis is quite rigid when non-erect, and becomes even more rigid during erection.

The male genitalia of mouse deer are similar to those of pigs. A stag’s penis forms an S-shaped curve when it is not erect, and is retracted into its sheath by the retractor penis muscle. Some deer species spray urine on their bodies by urinating from an erect penis. Wikimedia Commons has media related to Cetacea penis. Cetaceans have fibroelastic penises, similar to those of Artiodactyla. The tip of the cetacean penis, which tapers toward the end, is called the pars intrapraeputialis or terminal cone. Dolphins’ reproductive organs are located on the underside of the body.

Male dolphins have two slits, one concealing the penis and one further behind for the anus. Tapirs have exceptionally long penises relative to their body size. Canine penises have a structure at the base called the bulbus glandis. During copulation, the spotted hyena inserts his penis through the female’s pseudo-penis instead of directly through the vagina, which is blocked by the false scrotum and testes.