Question

why is it necessary for fertilization to occur in the outer third of the uterine tube?

Answer 1

why is it necessary for fertilization to occur in the outer third of the uterine tube?

The uterine tubes, also known as oviducts or fallopian tubes, are the female structures that transport the ova from the ovary to the uterus each month. In the presence of sperm and fertilization, the uterine tubes transport the fertilized egg to the uterus for implantation.

The uterine cylinders are uterine limbs found reciprocally at the predominant segment of the uterine cavity. These cylinders leave the uterus through a region alluded to as the cornua, shaping an association between the endometrial and peritoneal pits. Each uterine cylinder is roughly 10 cm long and 1 cm in distance across and is arranged inside the mesosalpinx. The mesosalpinx is a crease in the wide tendon. The distal bit of the uterine cylinder closes in an introduction surrounding the ovary. The essential capacity of the uterine cylinders is to transport sperm toward the egg, which is discharged by the ovary, and to then permit entry of the treated egg back to the uterus for implantation.

A uterine tube contains 3 parts. The first segment, closest to the uterus, is called the isthmus. The second segment is the ampulla, which becomes more dilated in diameter and is the most common site for fertilization. The final segment, located farthest from the uterus, is the infundibulum.

The infundibulum offers ascend to the fimbriae, fingerlike projections that are in charge of getting the egg discharged by the ovary. The blood vessel supply to the uterine cylinders is from parts of the uterine and ovarian courses; these little vessels are situated inside the mesosalpinx. The nerve supply to the uterine cylinders is by means of both thoughtful and parasympathetic filaments. Tactile strands keep running from thoracic fragments 11-12 (T11-T12) and lumbar section 1 (L1). Lymphatic waste of the uterine cylinders is through the iliac and horizontal aortic hubs.

In the event that one sperm makes its way into the fallopian cylinder and tunnels into the egg, it prepares the egg. The egg changes with the goal that no other sperm can get in.

At the instant of fertilization, your baby's genes and sex are set. If the sperm has a Y chromosome, your baby will be a boy. If it has an X chromosome, the baby will be a girl..