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 .

Author: Zugor Netaur
Country: Sweden
Language: English (Spanish)
Genre: Environment
Published (Last): 28 April 2011
Pages: 324
PDF File Size: 12.62 Mb
ePub File Size: 1.63 Mb
ISBN: 503-9-13383-586-5
Downloads: 11309
Price: Free* [*Free Regsitration Required]
Uploader: Ditaur

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. 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 egg is released about two weeks after the beggining of the menstruation and lives around 24 hours, during which it can be fertilized. Activity in English is under construction.

Fecundación y nidación by Rosangel Crespo on Prezi

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. 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. If it find the egg, the spermatozoa surround it placengacion only one gets through the membrane and enters the nucleus.

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. 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.

If it does not find any egg it dies after about 3 or 4 days. In the spermatogenesis placentacionn 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. Animation on pregnancy and the childbirth Spanish activity.


deflexionadas de bregma, frente y cara. situacion transversa

Well, it all is expained in this chapter. The placenta is formed from the capillaries of the embryo and of the endometrium. The first structure that is nidaciom is a solid cell mass morula moves down through the fallopian tube.

The pass from somatic cells to sex cells is called fecundaclon and consists of two successive cell divisions. The detachment of the endometrium is called a menstruation or a period. This phase lasts around 8 hours.

In the reproduction it is clear that men and women are not equal, but complementary. It is implanted on the uterine’s mucous membrane nesting. In the following drawing the gametogenesis in the rat is showed. These three diseases, which are or may be mortal, have increased significantly in the recent years becouse of the overconfidence.

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. Then the zygote begins to multiply embryonic development and gives rise to the embryo.

There are two pplacentacion of meiosis: There are many changes taking place in women’s body, both physical and chemical hormonesand psychological. 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.

Gestación de los animales

In conclusion, the woman is the main character of this story. It can distinguish three phases: The formation of sex cells. The endometrium is the layer that cover the inside of the uterus. The period from the moment of fertilization until the birth is called the pregnancy.

It usually endures about nine months. Relate Pictures with Names Spanish activity. During this phase, about 20 minutes after birth, the contractions restart and the nifacion is ejectedwhich was previously detached, it is a process that is accompanied with small bleeding.

This happens about six days after fertilization. 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.


This organ allows providing oxygen O2 and nutrients from plcentacion maternal blood to the embryo and transfer carbon dioxide CO2 and excretory products mainly urea produced by the embryo to maternal blood. Standards of prevention of sexually transmitted diseases. Multiple Choice Test Spanish activity. A mass with a hollow interior blastula is formed from it.

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 nieacion cord is cut and tied. 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. 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.

Otherwise the children would have twice as many chromosomes as their parents. It is the process of the expulsion of the fetus.

Gestación de los animales

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

Previous post: