The male armadillo is known to have the longest penises, in proportion to the body size, of any mammal. Males are called lister ... Their diet can consist of grains, roots, fruits and even small vertebrates. These armadillos have even been found to eat ...

Maxilla - in vertebrates, is the upper fixed (not fixed in Neopterygii) bone of the jaw formed from the fusion of two maxillary ... Erectile dysfunction - (ED), also called impotence, is the type of sexual dysfunction in which the penis fails to become or ... In vertebrates, the hypothalamus is the neural control center for all endocrine systems. The study of the endocrine system and ... The ears of vertebrates are placed somewhat symmetrically on either side of the head, an arrangement that aids sound ...

The penis of the male mandrill is crimson and the scrotum is lilac; the face is also brightly colored. The coloration is more ... and even small vertebrates. The Barbary macaque's diet consists mostly of leaves and roots, though it will also eat insects and ...

Compared with other vertebrates, birds have a body plan that shows many unusual adaptations, mostly to facilitate flight. The ... McCracken, KG (2000). "The 20-cm Spiny Penis of the Argentine Lake Duck (Oxyura vittata)" (PDF). The Auk. 117 (3): 820-825. doi ... In birds, however, it is quite common-more so than in any other vertebrate class. Although territory and nest site defence, ... Most birds can fly, which distinguishes them from almost all other vertebrate classes. Flight is the primary means of ...

In non-mammalian vertebrates, however, there are some key differences: Red blood cells of non-mammalian vertebrates are ... examples are the erectile tissue in the penis and clitoris. Another example of a hydraulic function is the jumping spider, in ... Vertebrate blood is bright red when its hemoglobin is oxygenated and dark red when it is deoxygenated. Some animals, such as ... In vertebrates, the various cells of blood are made in the bone marrow in a process called hematopoiesis, which includes ...

The penis contains a tube through which semen (a fluid containing sperm) travels. In female mammals, the vagina connects with ... In vertebrates, they are produced within the ovaries. They are large, immobile cells that contain the nutrients and cellular ... About 99% of vertebrates are gonochoric, and the remaining 1% that are hermaphroditic are almost all fishes. The majority of ... In humans and other mammals, this male organ is known as the penis, which enters the female reproductive tract (called the ...

... is the layer of usually soft, flexible outer tissue covering the body of a vertebrate animal, with three main functions: ... and os penis/os clitoris. All mammals have some hair on their skin, even marine mammals like whales, dolphins, and porpoises ... Sweat glands and sebaceous glands are both unique to mammals, but other types of skin gland are found in other vertebrates. ... The toxins can be fatal to most vertebrates or have no effect against others. These glands are alveolar meaning they ...

Vertebrates become affected by the waters contaminated with TBT, as well as by consuming organisms that have already been ... promoting female penis growth. There have been many theories as to why molluscs are affected by TBT. For example, previous ... Oryzias latipes, commonly called Japanese rice fish, has been used as a model vertebrate organism to test for effects of TBT at ... TBT toxicity can lead to biomagnification or bioaccumulation within such nontarget organisms like invertebrates, vertebrates, ...

... so that the penis has two ends corresponding to the females' two vaginas. The penis is used only during copulation, and is ... Benton MJ (1997). Vertebrate Palaeontology. London: Chapman & Hall. p. 306. ISBN 978-0-412-73810-4. Rincon P (12 December 2003 ... The males have a split or double penis lying in front of the scrotum. A pouch is present in most, but not all, species. Many ... The shape of the glans penis varies among marsupial species. The male thylacine had a pouch that acted as a protective sheath, ...

The main component of the system is the neuromast, a cell similar to hair cells present in the vertebrate ear that interact ... "Why Do Sharks Have Two Penises?". ReefQuest Centre for Shark Research. Archived from the original on 2009-08-28. Retrieved 2009 ... Pough, F. H.; Janis, C. M.; Heiser, J. B. (2005). Vertebrate Life (7th ed.). New Jersey: Pearson Education Ltd. ISBN 978-0-13- ... Shark eyes are similar to the eyes of other vertebrates, including similar lenses, corneas and retinas, though their eyesight ...

Body of penis Corpus cavernosum penis Corpus spongiosum penis Helicine arteries Fascia of penis Suspensory ligament of penis ... Lungs Bronchopulmonary segments Bronchioles Thoracic cavity The thoracic cavity is the chamber of the body of vertebrates that ... veins Lateral sacral veins Vesical veins Middle rectal veins Internal pudendal vein Deep veins of clitoris Deep veins of penis ... anal nerves Perineal nerves Posterior labial nerves Posterior scrotal nerves Dorsal nerve of clitoris Dorsal nerve of penis ...

On the other hand, fossils of early chordates are very rare, as non-vertebrate chordates have no bone tissue or teeth, and ... penis worms, mud dragons etc.) and spiralians (mollusks, annelids, flatworms, rotifers, arrow worms, etc.) as well as the ... Chordates (which include all the vertebrates) are deuterostomes. It seems likely that the 555 million year old Kimberella was a ... Shu, D.-G.; Conway Morris, S. & Zhang, X.-L. (November 1999). "Lower Cambrian vertebrates from south China". Nature. 402 (6757 ...

Human organs that have been regenerated include the bladder, vagina and the penis. As are all metazoans, humans are capable of ... The Caudata ("urodeles"; salamanders and newts), an order of tailed amphibians, is possibly the most adept vertebrate group at ... Bryant SV, Endo T, Gardiner DM (2002). "Vertebrate limb regeneration and the origin of limb stem cells". The International ... Alibardi L (2010). "Regeneration in Reptiles and Its Position Among Vertebrates". Morphological and Cellular Aspects of Tail ...

Some of the larger aquatic species mate by penis fencing - a duel in which each tries to impregnate the other, and the loser ... The definitive host in which adults develop is a land vertebrate; the earliest host of juvenile stages is usually a snail that ... "Fighting to mate: flatworm penis fencing". PBS. Archived from the original on 2013-11-14. Retrieved 2008-12-21. The Carter ... with mature stages that live as parasites in the digestive systems of fish or land vertebrates, and intermediate stages that ...

When the adaptive immune system of a vertebrate encounters a virus, it produces specific antibodies that bind to the virus and ... Human papillomaviruses are an established cause of cancers of cervix, skin, anus, and penis. Within the Herpesviridae, Kaposi's ... A second defence of vertebrates against viruses is called cell-mediated immunity and involves immune cells known as T cells. ... "Sequences from ancestral single-stranded DNA viruses in vertebrate genomes: the parvoviridae and circoviridae are more than 40 ...

In vertebrates, vinclozolin also acts as a neuroendocrine disruptor, affecting behaviors tied to locomotion, cognition, and ... At higher dose levels, male sex organ weight decreased further, and sex organ malformations were seen, such as reduced penis ...

Their mating ritual involves penis fencing in which both try to stab to inseminate the other and at the same time avoid being ... Infanticide has been extensively studied in vertebrates such as hanuman langurs, big cats, house sparrows and mice. However, ... There are also other mechanisms involved in sexual conflict such as traumatic insemination, forced copulation, penis fencing, ... penis fencing, love darts, mate guarding, harassment/aggressive behavior, and traumatic insemination. Females can experience a ...

A bone is a rigid organ that constitutes part of the skeleton in most vertebrate animals. Bones protect the various other ... and os penis/ os clitoris. A deer's antlers are composed of bone which is an unusual example of bone being outside the skin of ... Many bone diseases that affect humans also affect other vertebrates-an example of one disorder is skeletal fluorosis. Bones ... Journal of Vertebrate Paleontology. 28 (3): 685-691. doi:10.1671/0272-4634(2008)28[685:AAOVPI]2.0.CO;2. ISSN 0272-4634. S2CID ...

Once the penis has been discarded, banana slugs are still able to mate using only the female parts of the reproductive system. ... Slugs are preyed upon by various vertebrates and invertebrates. The predation of slugs has been the subject of studies for at ... Apophallation allows the slugs to separate themselves by one or both of the slugs chewing off the other's or its own penis. ... Reise, H; Hutchinson, J.M.C. (2002). "Penis-biting slugs: wild claims and confusions" (PDF). Trends in Ecology and Evolution. ...

Weishampel DB (1984). "Interactions between Mesozoic Plants and Vertebrates: Fructifications and seed predation". N. Jb. Geol. ... is possible that pairs mated back-to-back with the female staying still in a lordosis posture as the male maneuvers his penis ... a behaviour also found in other vertebrates. The problem posed by the ratio is that the multiple specimens studied, died in the ... Journal of Vertebrate Paleontology. 31 (3): 641-651. doi:10.1080/02724634.2011.557112. S2CID 83521877. Isles, T. (2009). "The ...

The female spotted hyena has a unique urinary-genital system, closely resembling the penis of the male, called a pseudo-penis. ... The numbers of males and females need not be equal, and in vertebrate species studied so far, there are usually fewer males. ... the penis is not withdrawn and research has shown a positive relationship between length of the time that the penis is licked ... Penis fencing is a mating behaviour engaged in by certain species of flatworm, such as Pseudobiceros bedfordi. Species which ...

Pseudo-penis Fossa (animal)#External genitalia Passing (gender) Sequential hermaphroditism East ML, Burke T, Wilhelm K, Creig C ... It is more commonly seen within invertebrate species, although sexual mimicry is also seen among vertebrates such as spotted ... Frank LG (February 1997). "Evolution of genital masculinization: why do female hyaenas have such a large 'penis'?". Trends in ... Subordinate hyenas will greet dominant individuals by erecting their penis or pseudopenis and allowing the dominant individual ...

Males have a blue scrotum and red penis. The monkeys are sexually dimorphic, wild adult males range from 42 to 59 cm (17 to 23 ... and other vertebrate prey. Their preferred foods are fruit and flowers, a seasonal resource, varied to cope with changes in ...

Males have a penis that is inserted into the tail. It becomes apparent only during the mating season when it is inserted into ... Fritz, Uwe; Havaš, Peter (2007). "Checklist of Chelonians of the World" (PDF). Vertebrate Zoology. 57 (2): 204. Archived from ...

... penis, much of pinna, and scrotum Blood vessels on route to the dermis Lymphatic vessels on route from the dermis The glandular ... is the lowermost layer of the integumentary system in vertebrates. The types of cells found in the layer are fibroblasts, ...

With the exception of screamers, males have penises, a trait that has been lost in the Neoaves. Due to their aquatic nature, ... Waterfowl are the best-known examples of sexually antagonistic genital coevolution in vertebrates, causing genital adaptations ...

Males have an externally visible penis, located in the mid-abdomen, but the testicles are recessed into pouches close to the ... and even small vertebrates. It has a high tolerance for toxins and has been recorded consuming scorpions and even venomous ...

Furthermore, the lack of a baculum (penis bone) found in all lower primates means that the fossil was from a female. X-rays ... It has been named Ida after the daughter of Jørn Hurum, the Norwegian vertebrate paleontologist from the Natural History Museum ... A year later at the Hamburg Fossil and Mineral Fair in December 2006, the dealer asked Norwegian vertebrate palaeontologist ... curator of vertebrate paleontology at the Carnegie Museum of Natural History, was that Darwinius was not a "missing link" ...

As is characteristic of Sigmodontinae, the marsh rice rat and O. couesi have a complex penis, with the baculum (penis bone) ... Quaternary land vertebrates of Jamaica. Geological Society of America Memoir 182:417-442. Musser, G.G. and Carleton, M.D. 2005 ... The outer surface of the penis is mostly covered by small spines, but there is a broad band of nonspinous tissue. The papilla ( ... On the urethral process, located in the crater at the end of the penis, a fleshy process (the subapical lobule) is present; it ...

Like most marsupials, male bandicoots have bifurcated penises. The embryos of bandicoots have a chorioallantoic placenta that ... Journal of Vertebrate Paleontology. 33 (1): 153-168. Bibcode:2013JVPal..33..153T. doi:10.1080/02724634.2012.713416. hdl:11336/ ... Journal of Vertebrate Paleontology. 30 (5): 1528. Bibcode:2010JVPal..30.1528T. doi:10.1080/02724634.2010.501463. S2CID 86726840 ... Journal of Vertebrate Paleontology. 34 (2): 375. Bibcode:2014JVPal..34..375T. doi:10.1080/02724634.2013.799071. S2CID 85622058 ...