FECUNDACION NIDACION PLACENTACION PDF

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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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. This happens about six days after fertilization. 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.

In the reproduction it is clear that men and women are not equal, but complementary. A few days later it dries and falls fecundavion leaving a scar called navel. Graphs and questions about the embryonic growth. The period from the moment of fertilization until the birth is called the pregnancy.

The sperm is injected into the vagina and goes up to the uterus and then to the fallopian tubes. It usually endures about nine months. This phase lasts around 8 hours. The placenta is formed from the capillaries of the embryo and of the endometrium. 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.

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 placentcaion 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.

The first structure that is formed is a solid cell mass morula moves down through the fallopian tube. There are many changes taking place in women’s body, both physical and chemical hormonesand psychological. In a doubt is always better to abstain or use a condom.

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In conclusion, the woman is the main character of this story. We all should know how sex cells are formed and the process of the fertilization, pregnancy and childbirth.

Gestación de los animales

The endometrium is the layer that fechndacion the inside of the uterus. 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. The egg is released about two weeks after the beggining of the menstruation and lives around 24 hours, during which it can be fertilized.

In the following drawing the gametogenesis in the rat is showed. 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. Interestingly we invest a lot of energy njdacion give rise to cells that are nor for our use but to generate other individuals, they are called the sexual or reproductive placentaccion. 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.

Moreover, many of our life actions are related to the reproductive process, nidaicon as finding the person we want to have children with, living with this person, taking care of children, etc. If it find the egg, the spermatozoa surround it but only one gets through the membrane and enters the nucleus.

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 recundacion for those cells is recuperated.

Relate Pictures with Names Spanish activity. Standards of prevention of sexually transmitted diseases.

Gestación de los animales

The formation of sex cells. Well, it all is expained in this chapter. In case of women, the reproduction involves greater physical and mental effort than it happens for men, since fecundafion involves having a period every month for most nidacioon theirs life, pregnancy, childbirth and breastfeeding. Otherwise the children would have twice as many chromosomes as their parents.

Then the zygote begins to multiply embryonic development and gives rise to the embryo. It is the process of the expulsion of the fetus.

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These three diseases, which are or may be mortal, have increased significantly in the recent years becouse of the overconfidence. 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.

Activity in English is under construction. 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. 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. It is implanted on the uterine’s mucous membrane nesting. In human, somatic cells have 46 chromosomes and gametes have 23 chromosomes.

La fecundación y la gestación: by irene 🙂 on Prezi

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. 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.

There are two types of meiosis: Multiple Choice Test Spanish activity. A mass with a hollow interior blastula is formed from it. 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.

It can distinguish three phases: There are placenhacion different types of chromosomes that determine the placejtacion 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 detachment of the endometrium is called a menstruation or a period.