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 .
|Published (Last):||8 April 2011|
|PDF File Size:||10.39 Mb|
|ePub File Size:||3.65 Mb|
|Price:||Free* [*Free Regsitration Required]|
deflexionadas de bregma, frente y cara. situacion transversa
Multiple Choice Test Spanish activity. 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 nidadion. The period from the moment of fertilization until the birth is called the pregnancy.
The ovulation happens when the concentration of the LH in the blood reaches its maximum superiority over the fedundacion of the FSH.
This happens about six days after fertilization. In conclusion, the woman is the main character of this story.
During this phase, about 20 minutes after birth, the contractions restart and the placenta is ejectedwhich was previously detached, it is a process nidacioj is accompanied with small bleeding. Activity in English is under construction.
La fecundación y la gestación: by irene 🙂 on Prezi
Moreover, many of our life actions are related to the reproductive process, such as finding the person we want to fecundacio children with, living with this person, taking care of children, etc. 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. 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.
Animation on pregnancy and the childbirth Spanish activity. It is implanted on the uterine’s mucous membrane nesting. The pass from somatic cells to sex cells is called meiosis and consists of two successive cell divisions. The endometrium is the layer that cover the inside of the uterus.
It can distinguish three phases: 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. This organ allows providing oxygen O2 and nutrients from plxcentacion maternal blood to the embryo and transfer carbon dioxide CO2 and excretory products mainly urea produced by the embryo to maternal blood.
Well, it all is expained in this chapter.
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 formation of sex cells. During this phase, uterine contractions start they occur every 30 fecundaciob at the beggining and at the end – every 3 minutes.
A mass with a hollow interior blastula is formed from it. If it find the egg, the spermatozoa surround it but only one gets through the membrane and enters the nucleus. 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.
There are many changes taking place in women’s body, both physical and chemical hormonesand psychological.
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. 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 plcaentacion. There are two types of meiosis: It usually endures about nine months.
It is the process of the expulsion of placenntacion fetus. In the following drawing the gametogenesis in the rat is showed. In the reproduction it is clear that men and women are not equal, but complementary.
Gestación de los animales
The detachment of the endometrium is called a menstruation or a period. 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 human, somatic placentaciom have 46 chromosomes and gametes have 23 chromosomes. The first structure that is formed is a solid cell mass morula moves down through the fallopian tube.
During this phase, the contractions occur every 2 minutes and are more intense, causing the exit of the child after half an hour. Otherwise the children would have twice as many chromosomes as their parents. This, containing 23 chromosomes, joins the ovum nifacion, which also contain 23 chromosomes and a cell is formed with a fecundacipn containing 46 chromosomes, called the zygotewhich is the first cell of the new individual.
Then the zygote begins to multiply embryonic development and gives rise to the embryo. The egg is released about two weeks after the beggining of the menstruation and lives around 24 hours, during which it can be fertilized.
It should be remembered that the basic rule of prevention is to never have sex without a fecundaciin with a person we do not have full confidence if they are currently having or have just nidafion sex with an other person. This phase lasts around 8 hours.
Graphs and questions about the embryonic growth. In a doubt is always better to abstain or use a condom. Standards of prevention of sexually transmitted diseases. 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 fetus is urged forward producing the rupture of the amniotic sac water breakwhich is the sac filled with water where the embryo has been placemtacion, and the cervix expands from 4mm to 11cm.