instance_of oviduct
The uterotubal ___MASK85___ or utero - tubal ___MASK85___ is the connection between the endometrial cavity of the uterus and the fallopian tube ( uterine tube ) at the proximal tubal ___MASK97___ , the beginning of the intramural part of the fallopian tube . Histologically , the endometrial epithelium changes over to the ciliated tubal epithelium . The Fallopian tubes , also known as , uterine tubes , and salpinges (" singular " salpinx ), are ___MASK48___ very ___MASK60___ tubes lined with ciliated epithelia , leading from the ovaries of female mammals into the uterus , via the uterotubal junction . In non - mammalian vertebrates , the equivalent structures are called oviducts . In vertebrates , other than mammals , the ___MASK49___ from the ovaries to the outside of the body is known as the oviduct . In female mammals this is known as the Fallopian tube . The eggs travel along the oviduct . These eggs will either be fertilized by sperm to become a zygote , or will degenerate in the body . Normally , these are paired structures , but in birds and some cartilaginous fishes , one or the other side fails to develop ( together with the corresponding ovary ) , and only one functional oviduct is found . Except in teleosts , the oviduct does not directly contact the ovary . Instead , the most anterior portion ends in a funnel - shaped structure called the infundibulum , which collects eggs as they are released by the ovary into the body cavity . The only female vertebrates to lack oviducts are the jawless fishes . In these ___MASK75___ , the single fused ovary releases eggs directly into the body cavity . The fish eventually extrudes the eggs through small genital pores towards the rear of the body . Vertebrates comprise all ___MASK75___ of animals within the subphylum Vertebrata ( chordates with backbones ). Vertebrates represent the overwhelming majority of the phylum Chordata , with currently about 64 , 000 ___MASK75___ described . Vertebrates include the jawless fish and the jawed vertebrates , which include the cartilaginous fish ( sharks and rays ) and the bony fish . The uterus ( from Latin " uterus ", plural " uteri ") or womb is a major female ___MASK38___ - responsive reproductive ___MASK65___ of humans and most other mammals . In the human , the lower end of the uterus , the cervix , opens into the vagina , while the other end , the fundus , is connected to the fallopian tubes . It is within the uterus that the fetus develops during gestation . In the embryo the uterus develops from the paramesonephric ducts which fuse into the single organ known as a simplex uterus . The uterus has different forms in many other animals and in some it exists as two separate uteri known as a duplex uterus .