start of biojournal

Ok, I think it is time I started on this 20% of my marks. Right, to make this experience fun and interesting, I think I will choose two rather interesting topics - sexual reproduction and issues on sex. Also, as I was not there during the briefing of the journal guidelines, I hope you excuse me should I write off-topic.

First, let us dwelve into the rough definition of sexual reproduction. According to http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/S/Sexual_Reproduction.html, it is the formation of a new individual (animal or plant) following the union of two gametes. These two gametes differ in structure and are contributed by both parents. Ultimately, these two gametes need to unite and to have nutrients to develop. In humans, the gametes are the sperm and the egg.
Without further a do, let's start on my first question dealing with how reproduction in humans actually occurs. To do this, we must first discover the main anatomy of the male reproductive system.

The two testicles are organs that produce and store millions of sperms. The testicles also produce hormones, like testosterone, which is the hormone that causes guys to develop deeper voices, bigger muscles, and body and facial hair, and it stimulates the production of sperm.

The epididymis and the vas deferens, which make up the duct system of the male reproductive organs. The vas deferens is a muscular tube that passes upward alongside the testicles and transports the sperm-containing fluid called semen. The epididymis is a set of coiled tubes that connects to the vas deferens.

The scrotum. is a pouch-like structure outside the pelvis which contains the testicles This bag of skin helps to regulate the temperature of testicles through contraction and expansion, which need to be kept cooler than body temperature to produce sperm. During puberty, pubic hair grows on the scrotum

The accessory glands, including the seminal vesicles and the prostate gland, provide fluids that lubricate the duct system and nourish the sperm. The seminal vesicles are sac-like structures attached to the vas deferens to the side of the bladder. The prostate gland, which produces some of the parts of semen, surrounds the ejaculatory ducts at the base of the urethra, just below the bladder. The urethra is the channel that carries the semen and urine to the outside of the body through the penis.

The penis is actually made up of two parts: the shaft and the glans. The shaft is the main part of the penis and the glans is the tip. At the end of the glans is a small opening, which is where semen and urine exit the body. The inside of the penis is made of a spongy tissue that can expand and contract.

Having roughly explained the purpoes of every part of the organ, I'll move on to deal with how semen is created and its purpose in reproduction in my next post. I would like to acknowledge http://kidshealth.org/teen/sexual_health/changing_body/male_repro.html for their information and http://static.howstuffworks.com/gif/male-reproductive-system-1.jpg.