cloaca
英
美
n. 下水道，阴沟，泄殖腔
复数：cloacas
COCA.45064
英英释义
noun
- a waste pipe that carries away sewage or surface water
- (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
双语例句
- Observation on a human foetus with congenital absence of external genitalia, persistent primitive cloaca and bilateral renal agenesis
先天性无外阴、原始泄殖腔保留与双侧肾未发育胎儿的观察 - IBD is the unique structure of birds at the top after the cloaca, the wall full of lymphoid tissue.
法氏囊是鸟类特有的结构，位于泄殖腔后上方，囊壁充满淋巴组织。 - The digestive tracts were divided into cavum oris, esophagus, ventriculus, duodenum, jejunum, ileum, rectum and cloaca.
结果表明：虎纹蛙消化道分为口咽腔、食道、胃、十二指肠、空肠、回肠、直肠和泄殖腔。 - Results None of AmpC β-lactamase activity was detected in the wild type of Serratia marcescans 、 Cloaca Enterobacter and hyper-inducible type Serratia marcescans.
结果野生型黏质沙雷菌、阴沟杆菌及高诱导型黏质沙雷菌经头孢他啶筛选后未检测出AmpC酶活性。 - The mucosal epithelium of rectum transforms into stratified squamous epithelium abruptly at the end of the rectum. The boundary line between rectum and cloaca was very distinct.
直肠黏膜上皮在直肠末端突然转变为泄殖腔的复层扁平上皮，两者之间界线明显。 - Results: At 18th day of incubation, ureteric bud from cloaca grew into metanephrogenic tissue which produced many metanephrogenic vesicles.
结果：孵育第18天，从泄殖腔附近发出的输尿管芽向生后肾组织侵入生长，生后肾组织产生许多生后肾小泡。 - Ducks are regarded as the natural reservoir of influenza viruses, and previous studies indicated that the avian influenza viruses could replicate in the digestive tract of ducks and shed through cloaca without causing any disease signs in these animals.
鸭一直被认为是禽流感病毒的自然宿主，以前的研究发现病毒感染鸭后主要在肠道复制并排泄，但并不引起鸭发病。 - This characteristic was similar to that of Clostridium butyricum but quite different from Enterobacter cloaca with Coli-type hydrogen-producing pathway.
这一性质与梭菌型产氢途径的丁酸梭菌表现出相似的规律，完全区别于阴沟肠杆菌铁依赖型的产氢机制。 - Nocens invaded posterior jejunum, ileum, ceca, rectum and cloaca. Developmental stages were localized within the epithelial cells of villi and crypts and in lamina propria.
nocens寄生于空肠后部、回肠、盲肠、直肠和泄殖腔的绒毛和肠腺上皮细胞及固有膜中。 - Distribution of neuropeptide Y and substance P in cloaca wall of Alligator sinensis
神经肽Y、P物质在***泄殖腔壁内的分布