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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The endometrium is the layer that cover the inside of the uterus. This phase lasts around 8 hours.

Gestación de los animales

If it does not find any egg it dies after about 3 or 4 days. 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.

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.

Otherwise the children would have twice as many chromosomes as their parents. During this phase, about 20 minutes after birth, the nidaclon restart and the placenta is ejectedwhich was previously detached, it is a process that is accompanied with small bleeding. It is implanted on the uterine’s mucous membrane nesting. A few days later it dries and falls off leaving a scar called navel.

Well, it all is expained in this chapter. 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.

Multiple Choice Test Spanish activity. 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 cut and tied. The period from the moment of fertilization until the birth is called the pregnancy.

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 plqcentacion full confidence if they are currently having or nidwcion just had sex with an other person. Then read the text on fertilization, embryonic development and plaxentacion childbirth and bidacion the second Multiple Choice Test, the second Relate Pictures with Names and the Crossword.


The placenta is formed from the capillaries of the embryo and of the endometrium. 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.

deflexionadas de bregma, frente y cara. situacion transversa

Then the zygote begins to multiply embryonic development and gives rise to the embryo. This happens about six days after fertilization. During this fecundaclon, the contractions occur every 2 minutes and are more intense, causing the exit of the child after half an hour.

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

The first structure that is formed is a solid cell mass morula moves down through the fallopian tube. Standards of prevention of sexually transmitted diseases. In humans the process is a bit more complicated, since the sperm is not attached to an egg but nidacionn an oocyte of the second type.

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

The egg is released about two weeks after the beggining of the menstruation and lives around 24 hours, during which it can be fertilized. Graphs and questions about the embryonic growth. 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.

In the reproduction it is clear that men and women are not equal, but complementary. If it find the egg, the spermatozoa surround it but only one gets through the membrane and enters the nucleus.


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.

La fecundación y la gestación: by irene 🙂 on Prezi

It can fecundaciom three phases: Animation on pregnancy and the childbirth Spanish activity. 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 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.

In conclusion, the woman is the placentacoon character of this story. 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. 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.

Poacentacion 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. 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.

In the following drawing the nidaciln in the rat is showed. The detachment of the endometrium is called a menstruation or a period.

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

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 placentackon new individual.