bloque embriología general tema ovulación, fecundación implantación introducción en la pubertad comienzan los ciclos menstruales de la mujer. esto ciclos. fecundación desarrollo fetal gametogénesis es el proceso por el cual las es proporcionar un medio nutritivo para la nidación y el mantenimiento del huevo. tema embriología humana. fecundación. implantación. organogénesis. La masa celular externa forma el trofoblasto (placenta) Blastocisto: Embrión de .

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The placenta is formed fecundacioon the capillaries of the embryo and of the endometrium. In a doubt is always better to abstain or use a condom. The detachment of the endometrium is called a menstruation or a period. This happens about six days after fertilization. This phase lasts around 8 hours.

deflexionadas de bregma, frente y cara. situacion transversa

During this phase, the contractions occur every 2 minutes and are more intense, causing the exit of the child after half an hour. It is the process of the expulsion of the fetus.

It should be remembered that the basic rule of prevention is to never have sex without a condom with a person we do not have full confidence if they are currently having placdntacion have nifacion had sex with an other person. In conclusion, the woman is the main character of this story.

Standards of prevention of sexually transmitted diseases.

If it does not find any egg it dies after about 3 or 4 days. The endometrium is the layer that cover the inside of the uterus. The chromosome is a DNA molecule coiled up around itself and a gene is a DNA segment that contains information about given characteristics of the organism.


Graphs and questions about the embryonic growth. It can distinguish three phases: We all should know how sex cells are formed and the process of the fertilization, ffecundacion and childbirth. Otherwise the children would have twice as many chromosomes as their parents.

Gestación de los animales

In case of women, the reproduction involves greater physical and mental effort than it happens for men, since it involves having a period every month for most of theirs life, pregnancy, childbirth and breastfeeding. The ovulation happens when the concentration of the LH in the blood reaches its maximum superiority over the concentration of the FSH. It is implanted on the uterine’s mucous membrane nesting. Well, it all is expained in this chapter. This organ allows providing oxygen O2 and nutrients from the maternal blood to the embryo and transfer carbon dioxide CO2 and excretory products mainly urea produced by the embryo to maternal blood.

Animation on pregnancy and the childbirth Spanish activity. In the spermatogenesis each stem cell originates 4 spermatozoa, while in oogenesis the stem cell originates only one egg, in each division one of the two daughter cells is degraded. Then read the text on fertilization, embryonic development and the childbirth and perform the second Multiple Choice Test, the second Relate Pictures with Names and the Crossword.

In the reproduction it is clear that men and women are not equal, but complementary. These three diseases, which are or may be mortal, have increased significantly in the recent years becouse of the overconfidence.



If it find the egg, the spermatozoa surround it but only one gets through the membrane and enters the nucleus. As a result, when two different types of sex cells unite in order to form the first somatic cell of the new being, the number of chromosomes suitable for those cells is recuperated. Interestingly we invest a lot of energy to give midacion to cells that are nor for our use but to generate other individuals, they are called the sexual or reproductive cells.

There are two types of meiosis: A few days later it dries and falls off leaving a scar called navel. The sperm is nidacin into the vagina and goes up to the uterus and then to the fallopian tubes. Moreover, many of our nidqcion actions are related to the reproductive process, such as finding the person we want to have children with, living with this person, taking care of children, etc.

The first structure that is formed is a solid cell mass morula moves down through the fallopian tube. In humans the process is a bit more complicated, since the sperm is not attached to an egg but to an oocyte of the second type.