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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 placental mammals
  • Cloaca: The Single Opening in Animals, Plus Human Implications
    A cloaca is a single bodily opening in many animals for excretion and reproduction In rare human cases, failure to separate during development leads to complications
  • 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 a Cloaca? One Opening for Everything - ScienceInsights
    A cloaca is a single body opening that handles three jobs at once: digestion waste, urinary waste, and reproduction Instead of having separate exits for each system, animals with a cloaca funnel everything through one shared chamber
  • What is a Cloaca and Which Animals Have One? - Biology Insights
    The cloaca is a common anatomical feature found across many vertebrate groups, indicating its ancient evolutionary origin All amphibians, such as frogs and salamanders, possess a cloaca
  • 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
  • Cloacal Malformation (Persistent Cloaca): Symptoms, Diagnosis . . .
    In developing fetuses, these openings are joined in a sac known as the cloaca Cloacal malformation, sometimes called persistent cloaca, is found in female children where the rectum, vagina and urethra are fused together, creating a single common channel
  • Understanding The Snake Cloaca: A Simple Guide
    The cloaca collects both types and stores them until the snake is ready to get rid of them This usually happens all at once, which is why snake droppings often look different from those of other animals The timing of waste removal is important for snakes They do not eat every day like humans do
  • 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 in Biology: Meaning, Structure Role in Animals - Vedantu
    A cloaca is a single, multipurpose opening found at the rear of the body in many animals It serves as the common exit for the digestive, urinary, and reproductive systems





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