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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It is the process of the expulsion of the fetus. If it find the egg, the spermatozoa surround it but only one gets through the membrane and enters the nucleus. In human, somatic cells have 46 chromosomes and gametes have 23 chromosomes. There are many changes taking place in women’s body, both physical and chemical hormonesand psychological. The pass from somatic cells to sex cells is called meiosis and consists of two successive cell divisions.

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 or have just had sex with an other person.

Gestación de los animales

The sperm is injected into the vagina and goes up to the uterus and then to the fallopian tubes. Multiple Choice Test Spanish activity.

Moreover, many of our life actions niacion 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 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.

The fetus is urged forward producing the rupture of the amniotic sac water breakwhich is the sac filled with water where the embryo has been living, and the cervix expands from 4mm to 11cm. Read the explanations on the formation of gametes and the menstrual cycle and fecundwcion the first Multiple Choice Test and the first Relate Pictures with Names.


This process is accompanied by a loss of blood and discomfort fecuneacion may be serious, it lasts 3 to 5 days and repeats every days, for this it is called the menstrual cycle.

The endometrium is the layer that cover the inside of the uterus.

It is implanted on the uterine’s mucous membrane nesting. It can distinguish three phases: During this phase, about 20 minutes after birth, the contractions restart and the placenta is ejectedwhich was previously detached, it fecundcaion a process that is accompanied with small bleeding.

This, containing 23 chromosomes, joins the ovum nucleus, which also contain 23 placetnacion and a cell is formed with a core containing 46 chromosomes, called the zygotewhich is the first cell of the new individual.


The formation of sex cells. We all should know how sex cells are formed and the process of fecundavion fertilization, pregnancy and childbirth. It usually endures about nine months. In conclusion, the woman is the main character of this story.

deflexionadas de bregma, frente y cara. situacion transversa

There are two different types of chromosomes that determine the sex of the individual, first one are called sex chromosomeswhich are the X chromosome and the Y chromosome, and the remaining 44 chromosomes are called non-sex chromosomes that are common equaly for women and men.

The sex cells or gametes are special cells which have half the chromosomes that have the cells of the rest of the body, which are called the somatic cells. 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.

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. Interestingly we invest a lot of energy to give rise to cells that are nor for our use but to generate other individuals, they are called the sexual or reproductive cells.

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. 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. Relate Pictures with Names Spanish activity. The ovulation happens when the concentration of the LH in the blood reaches its maximum superiority over the concentration of the FSH.


If inside the cells are two X chromosomes the individual is female and if there is an X and an Y the individual is a man.

If it does not find any egg it dies after about 3 or 4 days. This phase lasts around 8 hours. Graphs and questions about the embryonic growth. Animation on pregnancy and the childbirth Spanish activity.

A mass with a hollow interior blastula is formed from it. The first structure that is formed is a solid cell mass morula moves down through the fallopian tube.

Plwcentacion nine weeks, the embryo has a length of 3 to 4 cm, weighs about 2 to 4g, has almost all organs and a human form, so it is called a fecundacipn. In the reproduction it is clear that men and women are not equal, but complementary. 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.

In the following drawing the gametogenesis in the rat is showed. These three diseases, which are or may be mortal, have increased significantly in the recent years becouse of the overconfidence.

Then the zygote begins to multiply embryonic development and gives rise to the embryo. Activity in English is under construction. A few days later it dries and falls off leaving a scar called navel. Well, it all is expained in this chapter.