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 organ allows providing oxygen O2 and nutrients from the maternal blood to the embryo and transfer carbon dioxide CO2 fecuundacion excretory products mainly urea produced by the embryo to maternal blood. The egg is released about two weeks after the beggining of the menstruation and lives around 24 hours, during which it can be fertilized. It can distinguish three phases: This process is accompanied by a loss of blood and discomfort that may be serious, it lasts 3 to 5 days and repeats every days, for this it is called the menstrual cycle.

Graphs and questions about the embryonic growth.

Gestación de los animales

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.

During this phase, uterine contractions start they occur every 30 minutes at the beggining and at the end – every 3 minutes. 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 a doubt is always better to abstain or use a condom. These three diseases, which are or may be mortal, have increased significantly in the recent years becouse of the overconfidence.

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.

There are many changes taking place in women’s body, both physical and chemical hormonesand psychological.

La fecundación y la gestación: by irene 🙂 on Prezi

We all should know how sex cells are formed and the process of the fertilization, pregnancy placentacikn childbirth. In the reproduction it is clear that men and women are not equal, but complementary.

There are two types of meiosis: Then the zygote begins to multiply embryonic development and gives rise to the embryo. The formation of sex cells. 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 Fecnudacion chromosome, and the remaining 44 chromosomes are called non-sex chromosomes that are common equaly for women and men.


Otherwise the children would have twice as many chromosomes as their parents. Well, it all is expained in this chapter. 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.

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

A few days later it dries and falls off leaving a scar called navel. In humans the process is a ndiacion more complicated, since the sperm is not attached to an nidcaion but to an oocyte of the second type.

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

Then the child is put upside down and given a pat on the back to empty the water from the lungs and begin to breath first cryand the the umbilical cord is feecundacion and tied. Relate Pictures with Names Spanish activity. The pass from somatic cells to sex cells is called meiosis and consists of two successive cell divisions. If it find the egg, the spermatozoa surround it but only one gets through the membrane and enters the nucleus. It usually endures about nine months. The detachment of the endometrium is called a menstruation or a period.

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. In the following drawing the gametogenesis in the rat is showed. It is the process of the expulsion of the fetus. If it does not find any egg it dies after about decundacion or 4 days. The endometrium is the layer that cover the inside of the uterus. In conclusion, the woman is the main character of this story.


It is implanted on the uterine’s mucous membrane placentaciln. 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 human, somatic cells have 46 chromosomes and gametes have 23 chromosomes. 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.

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.

FECUNDACION Y NIDACION by dayana garrido on Prezi

The sperm is injected into the vagina and goes up to the uterus and then to the fallopian tubes. Animation on pregnancy and the childbirth Spanish activity. Moreover, 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 care of children, etc.

This happens about six days after fertilization. Activity in English is under construction. 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 placenta is formed from the capillaries of the embryo and of the endometrium. This phase lasts around 8 hours.

During this phase, about 20 minutes after birth, the contractions restart and the placenta is ejectedwhich was previously fecundadion, it is a process that is accompanied with small bleeding.

Standards of prevention of sexually transmitted diseases. The first structure that is formed is a solid cell mass morula moves down through the fallopian tube.

This, containing 23 chromosomes, joins the fecunfacion 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. Multiple Choice Test Spanish activity.