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

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. Relate Pictures with Names Spanish activity. The sperm is injected into the vagina and goes up to the uterus and then to the fallopian tubes.

deflexionadas de bregma, frente y cara. situacion transversa

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. Multiple Choice Test Spanish activity. 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.

Activity in English is under construction. 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.

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. In a doubt is always better to abstain or use a condom. 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 fecundacin or have just had sex with an other person.


A mass with a hollow interior blastula is formed from it. If it does not find any egg it dies after about 3 or 4 days. 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 plzcentacion embryo to maternal blood.

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

The ovulation happens when the concentration of the LH in the blood reaches its maximum superiority over the concentration of the FSH. Then the child is put upside down and given placenracion pat on the back to empty the ndiacion from the lungs and begin to breath first cryand the the umbilical cord is cut and tied.

Fecundaicon, many of our life actions are related to the reproductive process, such as finding the person we want to have children with, living with this person, taking nidafion of children, etc. Animation on pregnancy and the childbirth Spanish activity.

During this phase, the contractions occur every 2 minutes indacion are more intense, causing the exit of the child after half an hour. It usually endures about nine months.

A few days later it dries and falls off leaving a scar called navel. Well, it all is expained in this chapter. 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. Standards of prevention of sexually transmitted diseases. Read the explanations on the formation of gametes and the menstrual cycle and perform the first Multiple Choice Test and the first Relate Pictures with Names.


Otherwise the children would have twice as many chromosomes as their parents. We all should know how sex cells are formed and the process niracion the fertilization, pregnancy and childbirth.

These three diseases, which are or may be mortal, have increased significantly in the recent years becouse of the overconfidence. The first structure that is formed is a solid cell mass morula moves down through the fallopian tube. The formation of sex cells.

The placenta is formed from the capillaries of the embryo and of the endometrium. This happens about six days after fertilization. The period from the moment of fertilization until the birth is called the pregnancy.

Fecundación y nidación by Rosangel Crespo on Prezi

It is the process of the expulsion of the fetus. The pass from somatic cells to sex cells is called meiosis and consists of two successive cell divisions. During this 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 nidaclon bleeding.

The egg is released about two weeks after the beggining of the menstruation and lives around 24 hours, during which it can be fertilized. There are two types of meiosis: The endometrium is the layer that cover the inside of the uterus.