1. Science of sex :

 

 

 

Male

Penis is the male reproductive organ, that in mammals usually also provide the channel by which urine leaves the body.  

A penis is the main " highway " of sperm cell.


Sperm is derived from the Greek word sperma meaning " seed ".

Sperm cells cannot divide and have a limited life span, but after fusion with egg cells during fertilization,
a new organism begins developing.


A sperm consists of a head and a tail, they swim to touch the female egg during sexual intercourse,
when it is fertile a fetus is developed.



Female

The female reproductive system is designed to carry out several functions.
It produces the female egg cells necessary for reproduction, is called the ova or oocytes.
The system is designed to transport the ova to the site of fertilization.

 

 

 

 The female reproductive system (vagina) contains two main parts:

 The uterus

 Which hosts the developing fetus, produces vaginal and uterine secretions and passes sperm through to the fallopian tubes

 The ovaries

 Which produce the female's egg cells.

 

Menstruation The cycle of producing and releasing mature ova and to prepare for a possible pregnancy in human females.

This is from the Latin mensis which means month. The cycle lasts on the average 28 days.

This are caused by the female hormone or the luteinising hormone, estrogen, and progesterone.


Sex intercourse

Sex in the old time meaning,  " a coming together or joining together " describing sexual activities 

Usually refers exclusively to penile-vaginal penetration. This process is the reproduction of sibling.


 

Contraception

                                       

Pill is an example of contraceptive



Or birth control prevents pregnancy by interfering with the normal process of ovulation, fertilization, and implantation.

There are many types of contraception, such as pills, condoms.

Pills are taken orally, condom is a example of a barrier to prevent the sperm from getting to and fertilizing the egg.

Preventing unwanted pregnancy is easy, by using of contraceptives.


Homosexual

Sexual behavior between members of the same sex or gender, a man to a man, a woman to a woman.

The most common terms for homosexual people are lesbian and gay.


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