During sexual arousal, penile arteries dilate and a large volume of blood fills the penis, resulting in erection. This fluid is milky white in color and contains enzymes, proteins, and other chemicals to support and protect sperm during ejaculation. Does a man go through menopause? Prior to puberty, there is no spermatogenesis due to the lack of hormonal triggers. The penis also contains a number of sensitive nerve endings. The ejaculatory duct enters the urethra as it passes through the prostate gland. After penetrating the interior of the oocyte, the nuclei of these haploid cells fuse to form a diploid cell known as a zygote.
Human Physiology/The male reproductive system
The erectile tissue of the corpora is divided by numerous small fibrous bands into many cavernous spaces, relatively empty when the penis is flaccid but engorged with blood during erection. Testicular size continues to increase throughout puberty, reaching maximal adult size about 6 years later. During copulation the vagina is inseminated, the spermatozoa move through chemotaxis see glossary to the ovum inside a Fallopian tube or the uterus. Each testis is supplied with blood by the testicular arteries , which arise from the front of the aorta just below the origin of the renal kidney arteries. The components of semen come from two sources: Mainly present in the armpits and around the genital area, their activity is the main cause of sweat odor, due to the bacteria that break down the organic compounds in the sweat.
Male reproductive system
The urethra, which carries the ejaculate to be expelled during orgasm, runs through the center of the prostate gland. In other projects Wikimedia Commons. Testosterone is responsible for the development of male characteristics, including muscle mass and strength, fat distribution, bone mass, facial hair growth, voice change, and sex drive. The scrotum changes size to maintain the right temperature. Each sperm is extremely small:
The Male Reproductive System
Description: The testes are responsible for making testosterone , the primary male sex hormone, and for generating sperm. Each testis contains over yards of tightly packed seminiferous tubules. Condoms are used to prevent pregnancy, transmission of sexually transmitted diseases STDs - such as gonorrhea, syphilis, and HIV , or both. Cells responsible for nurturing and development of sperm cells , provides both secretory and structural support; activated by FSH.