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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Gestación de los animales

The detachment of the endometrium is called a menstruation or a hidacion. There are two types of meiosis: The pass from somatic cells to sex cells is called meiosis and consists of two successive cell divisions.

Animation on pregnancy and the childbirth Spanish activity. If it find the egg, the spermatozoa surround it fecundacin only one gets through the membrane and enters the nucleus. 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.

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. The formation of sex cells. The period from the moment of fertilization until the birth is called the pregnancy. It can distinguish three phases: Relate Pictures with Names Spanish activity. 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.


In the following drawing the gametogenesis in the rat is showed. The placenta is formed from the capillaries of the embryo and of the endometrium. This phase lasts around 8 hours. 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.

Otherwise the children would have twice as many chromosomes as their parents. A mass with a hollow interior blastula is formed from it. In human, somatic cells have 46 chromosomes and gametes have 23 chromosomes.

The sperm is injected into the vagina and goes up to the uterus and then to the fallopian tubes. We all should know how sex cells are formed and the process of the fertilization, pregnancy and childbirth.

It usually endures about nine months. In conclusion, the woman is the main character of this story. Well, it all is expained in this chapter. Activity in English is under construction. During fecunndacion phase, about 20 minutes after birth, the contractions restart and the placenta is ejectedwhich was previously detached, it is a process that is accompanied with small bleeding.

Standards of prevention of sexually transmitted diseases. 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. In case of women, the reproduction involves greater physical and mental effort than it happens for men, placentcaion it involves having a period every month for most of theirs life, pregnancy, childbirth and breastfeeding.

Gestación de los animales

Then read the text on fertilization, embryonic development nidavion the childbirth and perform the second Multiple Choice Test, the second Relate Pictures with Names and the Crossword. In a doubt is always better to abstain or use a condom.


In the reproduction it is clear that men and women are not equal, but complementary. The sex cells or gametes are special placenhacion which have half the chromosomes that have the cells of the rest of the body, which are called the somatic cells.

Then the zygote begins to multiply embryonic development and gives rise to the embryo. Interestingly we invest a lot of energy to give rise to cells that are nor for our use but gecundacion 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. After 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 fetus.

The ovulation happens when the concentration of the LH in the blood reaches its maximum superiority over the concentration of the FSH. This happens about six days after fertilization.

deflexionadas de bregma, frente y cara. situacion transversa

It is the process of the expulsion of the fetus. The endometrium is the layer that cover the inside of the uterus.

Graphs and questions about the embryonic growth.