Introduction:
Of the 2 different types of reproduction: asexual reproduction and sexual reproduction, human uses the sexual reproduction. Sexual reproduction involves 2 parts: egg, which is provided by female, and sperm, which is provided by male. They fuse to form the fertilized egg, which grows into an offspring. One advantage of sexual reproduction over asexual reproduction is that evolution proceed much more effectively and rapidly.

Male:
Testes which produce sperms, are located in scrotal sac. It consists of approximately 1000 highly coiled seminiferous tubes with total length of 250 meter. Vas efferentia, fine tubes, connects from seminiferous tubes to the epididymis, where sperms are stored. From there, vas deferens joins to the urethra, a tube connecting from urinary bladder to the exterior that goes through penis. Erectile tissue, also located in penis, causes erection during periods of sexual excitement. Seminal vesicles, prostate glands, and Cowper's glands produce seminal fluid. The fluid, which lubricate the passenger through which sperm travel, and the sperm are transferred to the of the female during copulation.

Female:
The eggs are produced by ovaries, which is about 3 cm long, and they are passed into uterus, through one of the two fallopian tubes. Uterus, which is about the size of clenched fist, is where embryo develops. It is covered with thick walls of smooth muscles, and mucous lining. The vagina, serves as a birth canal, and a receptacle for sperm and it connects vagina to the exterior. Vulva, the external female organs include, labia majora, labia minora, and clitoris. Labia majora and Labia minora enclose the opening of urethra and vagina. Clitoris is a sensitive erectile organ, which responds to erotic stimulation.