Blog Alexander Vergara

Reproductive system The  reproductive system  or  genital system  is a system of  sex organs  within an  organism  which work together for the purpose of  sexual reproduction . Many non-living substances such as fluids,  hormones , and  pheromones  are also important accessories to the reproductive system.  Unlike most  organ systems , the  sexes  of  differentiated   species  often have significant differences. These differences allow for a combination of genetic material between two individuals, which allows for the possibility of greater  genetic   fitness  of the  offspring . The  human reproductive system  usually involves  internal fertilization  by  sexual intercourse . During this process, the male inserts his  erect penis  into the  female's   vagina  and  ejaculates   semen , which contains  sperm . The sperm then travels through the vagina and cervix into the  uterus  or  fallopian tubes  for fertilization of the  ovum . Upon successful  fertilization  and imp

The Defense Barriers  what are the defense barrieres? Natural barriers and the inmune system defend the body against organism that can cause infection (See also Lines of Defense.) Natural barriers include the skin, mucous membranes, tears, earwax, mucus, and stomach acid. Also, the normal flow of urine washes out microorganisms that enter the urinary tract. The immune system uses white blood cell and antibodies to identify and eliminate organisms that get through the body’s natural barriers. There are two types of defense barriers: the physical and chemicals barriers. what is a  physical barrier? Physical barrier  is the environmental and natural condition that act as a  barrier  in communication in sending message from sender to receiver. Organizational environment or interior workspace design problems, technological problems and noise are the parts of  physical barriers. What is chemical barrier? The  chemical  characteristics of certain areas of

Himno de la academia integral San Lucas Por la Gloria que se alcanza persistiendo. Paso a paso, por adarga la virtud Las lumbreras de la idea reluciend o En la ordenanza demandada por la cruz. I Si has sembrado en tierra buena con la fe Que merece tu designio, vencerás. El oficio de la ciencia a tu merced Con estudio y persistencia alcanzaras. II Los signos del candil revelarán Cada uno su verdad reclamará. Vas en busca de lo humano y con afán Hacia el cielo infinito ascenderán.