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Monkeys have open cheek pouches within the oral cavity, but they open out in some rodents of America. Hence the name "diplostomes" is associated with them, which means "two mouths." In some rodents, such as hamsters , the cheek pouches are remarkably developed; they form two bags ranging from the mouth to the front of the shoulders.
Instead, they form temporary skin folds (sometimes called "pseudo-pouches") in the mammary region when reproducing. [8] [9] [10] This type of pouch also occurs in echidnas which are monotremes. [11] Pouches have their own microbiota and it changes depending on reproductive stage: anoestrus, pre-oestrus, oestrus/birth, post-birth. [12]
An ectotherm (from the Greek ἐκτός (ektós) "outside" and θερμός (thermós) "heat"), more commonly referred to as a "cold-blooded animal", [1] is an animal in which internal physiological sources of heat, such as blood, are of relatively small or of quite negligible importance in controlling body temperature. [2]
A pouch is present in most, but not all, species. Many marsupials have a permanent bag, whereas in others the pouch develops during gestation, as with the shrew opossum, where the young are hidden only by skin folds or in the fur of the mother. The arrangement of the pouch is variable to allow the offspring to receive maximum protection.
The southern marsupial mole (Notoryctes typhlops), also known as the itjaritjari (pronounced [ˈɪɟɐrɪɟɐrɪ]) or itjari-itjari, [3] [4] is a mole-like marsupial found in the western central deserts of Australia.
This animal has a body length (including the head) of between 4 and 26 cm (1.6 to 10 in.), with an additional 7 – 30 cm (2.75 to 12 in.) of tail, which is always longer than the full body. Jerboa dental records reveal a slow increase in crown heights and that corresponds to a more open and dryer ecosystem.
Antechinus do not have a complete pouch, as in other marsupials, but simply a flap of skin covering the teats. [1] The number of teats in Antechinus species varies between different populations of the same species, [ 2 ] [ 18 ] and can be anywhere from six to 13. [ 18 ]
In physiology, thermoception or thermoreception is the sensation and perception of temperature, or more accurately, temperature differences inferred from heat flux.It deals with a series of events and processes required for an organism to receive a temperature stimulus, convert it to a molecular signal, and recognize and characterize the signal in order to trigger an appropriate defense response.