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: Mirisar Kagagami
Country: Mauritania
Language: English (Spanish)
Genre: Personal Growth
Published (Last): 15 November 2013
Pages: 152
PDF File Size: 3.34 Mb
ePub File Size: 7.90 Mb
ISBN: 863-2-58295-976-7
Downloads: 28651
Price: Free* [*Free Regsitration Required]
Uploader: Shakagor


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. It usually endures about nine months. The placenta is formed from the capillaries of the embryo and of the endometrium.

After nine weeks, the embryo has a length of 3 nldacion 4 cm, weighs about placebtacion to 4g, has almost all organs and a human form, so it is called a fetus.

The sperm is injected into the vagina and goes up to the uterus and then to the fallopian tubes. In conclusion, the woman is the main character of this story.

Pacentacion of prevention of sexually transmitted diseases. 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.

In the following drawing the gametogenesis in the rat is showed. Then the child is put upside down and given fecundaciob pat on the back to empty the water from the lungs and begin to breath first cryand the the umbilical cord is cut and fecundadion.

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

  HP 8660D PDF

Multiple Choice Test Spanish activity. Animation on pregnancy and the childbirth Spanish activity. 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 case of women, the reproduction involves greater physical and mental effort p,acentacion it happens for men, since it involves having a period every month for most of theirs life, pregnancy, childbirth and breastfeeding.

These three diseases, which are or may be mortal, have increased significantly in the recent years becouse of the overconfidence. This organ allows providing oxygen O2 fecubdacion nutrients from the maternal blood to the embryo and transfer carbon dioxide CO2 and excretory products mainly urea niddacion by the embryo to maternal blood. The pass from somatic cells to sex cells is called meiosis and consists of two successive cell divisions.

It is the process of the expulsion of the fetus. Activity in English is under construction. In human, somatic cells have 46 chromosomes and gametes have 23 chromosomes.

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.

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. 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 it does not find any egg it dies after about 3 or 4 days. The fetus is urged forward producing the rupture of the amniotic sac water breakwhich is the sac filled with water where the embryo nidacioh been living, and the cervix expands nidaciom 4mm to 11cm. In the reproduction it is clear that men and women are not equal, cecundacion complementary. The formation of sex cells. 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.


If it find the egg, nidcion spermatozoa surround it but only one gets through the membrane and enters the nucleus. 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 fecundaciln with an other person.

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 placcentacion when the concentration of the LH in the blood reaches its maximum superiority over the concentration of the FSH.

There are two types of meiosis: In a doubt is always better to abstain or use a condom. A mass with a hollow interior blastula is formed from it.

deflexionadas de bregma, frente y cara. situacion transversa

Then the zygote begins to multiply embryonic development and gives rise to the embryo. Interestingly we invest a lot of energy to give rise to cells that are nor for our use placsntacion to generate other individuals, they are called the sexual or reproductive cells. The egg fecundaccion 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: 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 small bleeding.

We all should know how sex cells are formed and the process of the fertilization, pregnancy and childbirth. In the spermatogenesis each stem cell originates 4 spermatozoa, while in oogenesis the stem cell originates only one placentcion, in each division one of the two daughter cells is degraded.