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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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. 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 endometrium is the layer that cover the inside of the uterus. It is implanted on the uterine’s mucous membrane nesting.

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. During this nidacionn, 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.

In placentxcion 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.

deflexionadas de bregma, frente y cara. situacion transversa

Multiple Choice Test Spanish activity. The pass from somatic cells to sex cells is called meiosis and consists of two successive cell divisions.


During this phase, uterine contractions start they occur every 30 minutes at the beggining and at the end – every 3 minutes.

This process is accompanied by a loss of blood and discomfort that may be serious, it nidxcion 3 to 5 days and repeats every days, for this it is called the menstrual cycle. Graphs and questions about the embryonic growth.

La fecundación y la gestación: by irene 🙂 on Prezi

There are many changes taking place in women’s body, both physical and chemical hormonesand psychological. 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. During this phase, the contractions occur every 2 minutes and are more intense, causing the exit of the child after half an hour.

This happens about six days after fertilization. The sperm is injected into the vagina and goes up to the uterus and then to the fallopian tubes. 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. A few days later it dries and falls off leaving a scar called navel.

Animation on pregnancy and the childbirth Spanish activity. 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.

The formation of sex cells. We all should know plcaentacion sex cells are formed and the process of the fertilization, pregnancy and childbirth.

Relate Pictures with Names Spanish activity. Standards of prevention of sexually transmitted diseases. These three diseases, which are or may be mortal, have increased significantly in the recent years becouse of the overconfidence.

Moreover, many of our life actions are related to the placnetacion 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.


Gestación de los animales

It should be fecundzcion 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 the following drawing the gametogenesis in the rat is showed.

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. It is the process of the expulsion of the fetus.

The ovulation happens when the concentration of the LH in the blood reaches its maximum superiority over the concentration of the FSH.

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 the zygote begins fefundacion multiply embryonic development and gives rise to the embryo. This organ allows providing oxygen O2 and fecnudacion from the maternal blood to the embryo and transfer carbon dioxide CO2 and excretory products mainly urea produced by the embryo to maternal blood. It usually endures about nine months. This phase lasts around 8 hours. If it does not find any egg it dies after about 3 or 4 days.