Opossums make up the largest order of marsupials in the Western Hemisphere, including 103 or more species in 19 genera. They are also commonly called possums, though that term technically refers to Australian fauna of the suborder Phalangeriformes. The Virginia opossum was the first animal to be named an opossum; usage of the name was published in 1610.
Didelphimorphs are marsupials small and medium
enterprises, with the greatest excess of the size of a large house cat
and the smallest the size of a small mouse. The incisors are very small,
large canines and molars of the tricuspid valve. Didelphimorphs
plantigrade stance (feet flat on the floor) and hind legs have clawless
opposable digit. As some New World monkeys have prehensile tails
possums. Like all marsupials, the awn hair hair only, and the females
have a pouch. The tail and legs are scales. In particular, the twins
opossum is a penis-shaped gland named fork generic (Greek for
"brothers") Didelphis
Opossums have an incredibly strong immune system, and show
partial or total immunity to the venom of rattlesnakes and other snakes
moccasin. Opossums are about eight times less likely to carry
rabies than wild dogs and about 800 opossums are infected with this
virus As a marsupial, the opossum has a reproductive system including a
divided uterus and marsupium, the bag is. Opossums no placenta,
but short design, simple and unlike placental mammals is not fully
functional. The species are moderately sexually dimorphic, with males
usually slightly larger, heavier and larger dogs than females.
The
biggest difference between mammals and marsupial possum penis male and
female branches fork vaginal (the origin of the Latin word "Didelphis",
ie two wombed). Opossum sperm sperm has a conjugate form matching pairs
in the epididymis. Bound pairs dissociate into separate sperm before fertilization. Female opossums
often give birth to a large number of young people, most of which are
not tied to a teat, although as many thirteen young can attach, and
therefore survive, depending on species. As nocturnal animals, they
favor dark, secure areas. When "Playing Possum" animal's lips back,
teeth bared.
Saliva foams around the mouth, eyes closed or
semi-closed, and the smelly liquid His anal glands rigidly curly can be
pushed, again without even animals usually reactionThe again. Threatened
opossums (especially males) growling deeply, raising their pitch as the
threat becomes more urgent. When separated or distressed, baby opossums
will make a sneezing noise to signal their mother. When threatened, the
baby opens his mouth and breathe quietly until the threat is gone. Or
whining noise is a defensive process that helps the opossum deter other animals approaching.