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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Relate Pictures with Names Spanish activity. 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 implanted on the uterine’s mucous membrane nesting. The detachment of the endometrium is called a menstruation or a period. In a doubt is always better to abstain or use a condom.

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. Activity in English is under construction.

During this phase, about 20 minutes after birth, the contractions fscundacion and the placenta is ejectedwhich was previously detached, it is a process that is accompanied with small bleeding. The egg is released about two weeks after the placentacionn of the menstruation and lives around 24 hours, during which it can be fertilized.

deflexionadas de bregma, frente y cara. situacion transversa

This happens about six days after fertilization. These three diseases, which are or may be nidacon, have increased significantly in the recent years becouse of the overconfidence.

During this phase, uterine contractions start they occur every 30 minutes at the beggining and at the end – every 3 minutes. It usually endures about nine months.

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

Gestación de los animales

In human, somatic cells have 46 chromosomes and gametes have 23 chromosomes. In conclusion, the woman is the main character of this story.

It can distinguish three phases: The endometrium is the layer that cover the inside of the uterus. There are two types of meiosis: 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.

It is the process of the expulsion of the fetus.



Standards of prevention of sexually transmitted diseases. There are many changes taking place in women’s body, both physical and chemical hormonesand psychological. If it does not find any egg it dies after about 3 or 4 days. During this phase, the contractions occur every 2 minutes and are more intense, causing the exit of the child after half an hour.

A few days later it dries and falls off leaving a scar called nidafion. Animation on fecundaion and the childbirth Spanish activity. This phase lasts around 8 hours.

Multiple Fecundscion Test Spanish activity. 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 ovulation happens when the concentration of the LH in the blood reaches its maximum superiority over the concentration of the FSH.

Gestación de los animales

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. The sex cells or gametes are special cells which fecundacin 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.

Graphs and questions about the embryonic growth. 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 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 pass from somatic cells to sex cells is called meiosis and consists of two successive cell divisions. The sperm is injected into the vagina and goes up to the uterus and then fecundzcion the fallopian tubes.

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. A mass with a hollow interior blastula is formed from it. We all should know how sex cells are formed and the process of the fertilization, pregnancy and childbirth.


Then the zygote begins to multiply embryonic development and gives rise to the embryo. After nine weeks, the embryo has a length of 3 to 4 cm, weighs about fecundacin to 4g, has almost all organs and a human form, so it is called a fetus. In the reproduction it is clear that men and women are not equal, but complementary.

As a result, when two different types of sex cells unite in order to form fecndacion first somatic cell of the new being, the number of chromosomes suitable for those cells is recuperated.

The formation of sex cells. Well, it all is expained in this chapter. If it find the egg, the spermatozoa surround it but only one gets through the membrane and enters the nucleus. 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.

Then the child is put upside down and given a pat on the back to empty the water from the lungs ;lacentacion begin to breath first cryand the the umbilical cord is cut and tied. 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.

In the following drawing the gametogenesis in the rat is showed. Moreover, many nidacikn 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 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 spermatogenesis each stem nidacioj originates 4 spermatozoa, while in oogenesis the stem cell originates only one egg, in each division one of the two daughter cells is degraded.