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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Gestación de los animales

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 fecundcion daughter cells is degraded. We all should know how sex cells are formed and the process of the fertilization, pregnancy and childbirth. Relate Pictures with Names Spanish activity. It is the process of the expulsion of the fetus.

The detachment of the endometrium is called a menstruation or a period. Graphs and questions about the embryonic growth. The period from the moment of fertilization until the birth is called the pregnancy.

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.

The endometrium is the layer that cover the inside of the uterus.

Gestación de los animales

The placenta is formed from the capillaries of the embryo and of the endometrium. 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. During this phase, the contractions occur every 2 minutes and are more intense, causing the exit of the child after half an hour.


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 indacion.

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. Read the explanations on the formation fecundacoon gametes and the menstrual cycle and perform the first Multiple Choice Test and the first Relate Pictures with Names.

During this phase, uterine contractions start they occur every 30 minutes at the beggining and at the end – every 3 minutes. Well, it all is expained in this chapter. 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. 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.

La fecundación y la gestación: by irene 🙂 on Prezi

In the following drawing the gametogenesis in the rat is showed. Animation on pregnancy and the childbirth Spanish activity.

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 fecindacion have just had sex with an other person.

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Then the zygote begins to multiply embryonic development and gives rise to the embryo. The pass from somatic cells to sex niacion is called meiosis and consists of two successive cell divisions. This happens about six days after fertilization. This phase lasts around 8 hours.

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 sperm is injected into the vagina and goes up to the uterus and then to the fallopian tubes. Multiple Choice Test Spanish activity. In a doubt is always better to abstain or use a condom. A mass with a hollow interior blastula is formed from it.

It can distinguish three phases: Standards of prevention of sexually transmitted diseases. It usually endures about nine months. 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.

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.

There are two types of meiosis: