What process in the female reproductive system allows blood and tissue from the uterus to break down and pass through the vagina monthly?

What process in the female reproductive system allows blood and tissue from the uterus to break down and pass through the vagina monthly?

Unless the egg is fertilized by a sperm while in the fallopian tube, the egg leaves the body about 2 weeks later through the uterus — this is menstruation. Blood and tissues from the inner lining of the uterus combine to form the menstrual flow, which in most girls lasts from 3 to 5 days.

What is the name of the muscular opening that separates the vagina and uterus?

cervix
The cervix is the lower part of the uterus that opens into the vagina. During childbirth, the cervix expands about 4 inches (10 centimeters) so the baby can travel from the uterus through the vagina and into the world.

What is a zygote in the reproductive system?

The male gamete, or sperm, and the female gamete, the egg or ovum, meet in the female’s reproductive system. When sperm fertilizes (meets) an egg, this fertilized egg is called a zygote (ZYE-goat). The zygote goes through a process of becoming an embryo and developing into a fetus.

Where do women’s sex cells exit the body?

The uterus is divided into two parts: the cervix, which is the lower part that opens into the vagina, and the main body of the uterus, called the corpus. The corpus can easily expand to hold a developing baby. A canal through the cervix allows sperm to enter and menstrual blood to exit.

How many openings do females have?

There are two openings in the vulva — the vaginal opening and the opening to the urethra (the hole you pee out of). The urethral opening is the tiny hole that you pee out of, located just below your clitoris. The vaginal opening is right below your urethral opening.

How does sperm work in female body?

Once the sperm have entered the uterus, contractions propel the sperm upward into the fallopian tubes. The first sperm enter the tubes minutes after ejaculation. The first sperm, however, are likely not the fertilizing sperm. Motile sperm can survive in the female reproductive tract for up to 5 days.

What organ is behind the uterus?

Anterior to the uterus is the bladder, with rectum located posteriorly. Between the uterus and the rectum is the recto-uterine space, also known as the posterior cul-de-sac.

Is womb and uterus the same thing?

The hollow, pear-shaped organ in a woman’s pelvis. The womb is where a fetus (unborn baby) develops and grows. Also called uterus.

What are the 4 steps of fertilization?

asymmetric and motile sperm cell and a large and nonmotile egg. The stages of fertilization can be divided into four processes: 1) sperm preparation, 2) sperm-egg recognition and binding, 3) sperm-egg fusion and 4) fusion of sperm and egg pronuclei and activation of the zygote.

How many openings does a woman have?

What happens to the corpus luteum during pregnancy?

E) have a diminished response to follicle-stimulating hormone (FSH). The secretion of estrogen and progesterone by the corpus luteum during pregnancy is maintained by ________ until the corpus luteum degenerates and the ________ takes over secretion of these hormones.

Where does the sperm go after the meiotic division?

A) The entire sperm is transported into the cytoplasm of the oocyte, where the nucleus of the sperm releases its DNA to combine with the DNA of the oocyte and transcription occurs. The oocyte then undergoes the second meiotic division.

When does the placenta develop from the endometrium?

Once diffusion from the endometrium becomes inadequate for delivery of oxygen, the placenta develops from projections of the ________, which facilitates exchange of nutrients and waste by the ________. Which of the following is a correct association between an oocyte’s development and the follicular structure containing it?

How is the secretion of estrogen maintained during pregnancy?

The secretion of estrogen and progesterone by the corpus luteum during pregnancy is maintained by ________ until the corpus luteum degenerates and the ________ takes over secretion of these hormones. What is the function of the scrotum?