A female horse's reproductive tract is much more like a human's, with a uterus designed to carry a single foal at a time. The uterine body is large and the uterine horns are relatively short.
A female dog's uterus is essentially Y shaped and designed to carry multiple puppies. Each puppy has it's own placenta.
The lower end of female reproductive tract in pigs is not very different from humans. The reproductive system is conserved across all mammals.
Sperm is indeed considered a foreign structure when in the female reproductive system. However, it is not considered an antigen because it does not come into contact with the blood, therefore the antibody process does not happen.
It is called the cloaca The male chicken does not have a penis and there is no penetration of the female reproductive tract at the time of mating. Instead the female inverts her cloaca which comes in contact with the male's inverted cloaca and receives the sperm. The cloaca is then drawn back into the hen's body and the sperm are captured. They then begin the journey up the length of the reproductive system. The sperm live inside the female reproductive system for up to 10 days and each time an ovulation occurs (every 24-26 hours in good egg producers) the egg can become fertile.
Sperms have tail and they swim. Terrestrial condition does not permit that. So, it is best to have internal fertilization where sperms can creep up the lining of the female reproductive tract, rich in mucus, and find the ovum to fertilize.
Gestation
The lower female genital tract consists of the vagina and the cervix.
stomach and female reproductive tract
The upper female genital tract consists of the body of the uterus, the fallopian or uterine tubes, and the ovaries.
The penis is the organ than delivers semen to the female reproductive tract during sexual intercourse.
The fallopian tubes.
Fertilization occurs in the oviduct of the female reproductive tract
The lower end of female reproductive tract in pigs is not very different from humans. The reproductive system is conserved across all mammals.
1-5 days
It is called the vulva, which is literally the opening of the vaginal tract.
Slightly acidic, all the time, I believe.
The Uterus
The statement is partially true. Pelvic inflammatory disease can cause scarring in the female reproductive tract that can block the passage of gametes or zygotes. It does not affect males.