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cloaca    
n. 阴沟

阴沟

cloaca
n 1: (zoology) the cavity (in birds, reptiles, amphibians, most
fish, and monotremes but not mammals) at the end of the
digestive tract into which the intestinal, genital, and
urinary tracts open
2: a waste pipe that carries away sewage or surface water [synonym:
{sewer}, {sewerage}, {cloaca}]


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  • Cloaca - Wikipedia
    In the embryo, the embryonic cloaca divides into a posterior region that becomes part of the anus, and an anterior region that develops depending on sex: in males, it forms the penile urethra, while in females, it develops into the vestibule or urogenital sinus that receives the urethra and vagina [13][19] However, some placentals retain a
  • Cloaca: The Single Opening in Animals, Plus Human Implications
    What does a cloaca look like? A cloaca is just an orifice that, on many animals, isn't visible until it's open In some animals, it's just a hole that looks a lot like an anus For other animals, like snakes, it's a small slit or vent
  • Cloaca | Mammals, Birds, Reptiles | Britannica
    Cloaca, (Latin: “sewer”), in vertebrates, common chamber and outlet into which the intestinal, urinary, and genital tracts open It is present in amphibians, reptiles, birds, elasmobranch fishes (such as sharks), and monotremes
  • What is Cloaca? And Why Do Most Animals Have it Except Humans?
    The non-moving collection of urine in humans is a big deal if there is a cloaca "In kids with cloacas, the problem is mostly infection from the stool into their bladder "
  • CLOACA Definition Meaning - Merriam-Webster
    John Timmer, ArsTechnica, 17 Sep 2025 Everything comes out of one all-purpose hole called the cloaca in a chunky white paste that’s both poop and pee combined
  • Why some animals have just one hole for everything – from pooping to . . .
    What is a cloaca? A cloaca is a single opening in the bodies of birds, reptiles, amphibians, elasmobranch fish (including sharks) and monotremes (platypuses and echidnas), which serves as a combined digestive, urinary and reproductive tract
  • Cloaca | definition of cloaca by Medical dictionary
    cloaca The combined urinary and faecal opening in the embryo before the two become separated The term derives from the Latin cloaca a sewer
  • Cloaca (Cloacal Anomaly) - Childrens Mercy
    Cloaca is a birth defect in which a baby's rectum, vagina and urinary tract are fused together This common channel ends in a single opening on the baby’s bottom
  • Biology:Cloaca - HandWiki
    A cloaca ( kloʊˈeɪkə kloh-AY-kə), pl : cloacae ( kloʊˈeɪsi kloh-AY-see or kloʊˈeɪki kloh-AY-kee), is the rear orifice that serves as the only opening for the digestive, reproductive, and urinary tracts (if present) of many vertebrate animals





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