Human Reproduction System

HUMAN REPRODUCTION system

D o you know why you can born in this world? This is occur because reproduction.
What is reproduction? Reproduction is the biological process that produces new individual organisms.
The male genital system it consists of the penis, the testicles, the epididymis, the deferent canals, the seminal vesicles and the prostate. Testicle is place to make spermatozoa. Spermatozoa contain the genetic information that the man will transmit to his descendents. Spermatozoa contain only half the number of chromosomes (23) as other cells in the body that contain 46 chromosomes.
The female genital system It is comprised of ovaries, Fallopian tubes , the uterus and the vagina. The function of uterus is a place embryo to grow up, and uterus consist 3 layers are perimetrium, miometrium, and endometrium.
How the two organs make the reproduction? Human reproductive cells begin from the meeting of male (spermatozoa) and egg (ovum). Every cook eggs the size of this dot fell through channels to the uterus. In this way there is a possibility that the spermatozoon meets an ovum. Character spermatozoa are competing to get into the egg cell. If successful, spermatozoa will stick strongly and rapidly penetrate into the egg cell to reach its nucleus then fertilization process occurs.
Once a male reaches the egg cell nucleus female egg cells, a reaction occurs to change the nature pellucid zone. It can’t impenetrable by other spermatozoa. A man produced 400,000,000 (400 million) spermatozoa, while able to penetrate and fertilize only one cell. The fertilized egg, now called a zygote then it way down the Fallopian tube to the uterus. Thirty hours after fertilization, the zygote starts its cellular divisions. These are repeated every 12 to 16 hours. This fertilized egg divides into smaller-and-smaller cells, called blastomeric, until the morale stage. The 5th day fertilization, another decisive transformation occurs. The cells morale begin to move into the ball of cells (invaginate) and form an internal cavity, called a blastocele. After successful fertilization and implantation, gestation of the fetus then ac cures within the female’s uterus this process is pregnancy. Gestation is 40 weeks in human, after nine months is continued with birth process.


Widya novitasari sumirat (35/XIIA3)