Układ Rozrodczy taki straszny? Cykl Menstruacyjny i Budowa Układu Rozrodczego prosto i szybko😮

0:09 Here is the most important, in my opinion, organ system discussed in school. You will probably ask, but why is the most important one? All are important. And I see it like this. If you do not know how your nervous system works, you do not know the structure of a neuron, you do not remember which lobe of the brain is responsible for what activities, then nothing happens. Neurons work and the brain works no matter how long you remember about this system. If you don't know how your reproductive system works , surprises await you in life!

0:59 If you sometimes have the impression that you learn things at school that may never be useful in your life , then you are probably right. However, knowledge of the structure and functions of the organs of the reproductive system will certainly be useful . In 2015, the educational research institute asked 18-year-olds about the structure and functions of the reproductive organs. 14 percent of women and 9 percent of men answered all the questions Increasing knowledge, about the reproductive system is more than forging a stupid test there is no more life topic in the school curriculum First some general information: and sorry in advance for offending your intelligence with

1:48 obviousness men are different. They differ in features. And these features are ranked as follows. Primary features - the presence of organs that produce reproductive cells, i.e. gonads - male gonads are testes, female gonads are ovaries. The cells they produce are called gametes. So the male gonad - the testicle produces the male gamete, the sperm, the female gonad, the ovary, and the female gamete, i.e. the egg cell. Secondary sexual characteristics are the remaining organs of the reproductive system. About which we will tell in a moment. And tertiary sex characteristics are those unrelated to reproduction.

2:35 And these are male narrow hips, facial hair, broad shoulders, an Adam's apple, or the timbre of his voice. And female ones - bust, wide hips, voice timbre. Now let's look at the structure and function of both sexes. Let's start with the male - we have three most important functions of this system : 1. production of male gametes - i.e. sperm (the testes are responsible for this function) 2. introduction of sperm into the female reproductive system (the penis and other organs of the system will be responsible 3. production of sex hormones (here) We have already mentioned the

3:20 gonads or testes, i.e. the primary sexual characteristics, on them we will find the epididymis , i.e. places where sperm are temporarily stored, as well as places where sperm stimulates maturation . On this way, we will also meet seminal vesicles and the prostate gland, from these secreting glands there will be substances that together with sperm create semen or sperm . female

4:12 penis is made of the so-called Corpus cavernosum, which have the property that they can fill up with blood that slowly drains from them, this process called erection , of course, involves stiffening the penis and allowing sperm to enter the female genital tract. in the context of the structure of the male system, a very interesting issue is the location of the testicles in the scrotum outside the body. At first glance, auntie evolution did not do well - such an important organ should be inside the body, encased with bones (see the skull that protects the brain, or the chest that protects the important internal organs ...)

5:00 Why, then, the gonads - responsible for extending the species are so ... exposed ? Sperm, for proper development, require a few degrees lower temperature than the one inside the body ... That's why they are where they are Well, now the female reproductive system, here we are dealing with similar tasks, although there are some differences in the role of this system: Gamete production or eggs - the ovaries are responsible for this (primary sex characteristic) . Production of sex hormones - this is also where the ovaries enter, ensuring good conditions for the development of the offspring - the uterus will be great here.

5:58 Let's look at the anatomy. From the ovaries, mature eggs will be picked up by the fallopian tubes (it is in the fallopian tube that fertilization takes place if a sperm is found here). Both fallopian tubes enter the uterus - this is where the embryo will mature. The organ that connects to the uterus and exits the body is the vagina - it is the vagina that allows sperm to enter the female reproductive system. As you can see, both systems, although very different from each other, actually complement each other and their structure allows the connection of gametes. and we will call such a combination fertilization. The sperm, as a cell endowed with the ability to actively move, flows upwards in the female reproductive system,

6:52 i.e. passing the vagina and the uterus, it will go to one of the fallopian tubes and if it encounters an egg there is a chance of fertilization. The egg cell, in turn, has a spare material that the embryo will feed on in the first days of its existence. The last part of today's lesson, or the menstrual cycle . In the female reproductive system, there are changes that repeat approximately every 28 days (although this is just an approximation , this range can vary greatly from body to body). Since these changes occur cyclically, and one cycle lasts about a month , you already know where the name menstrual cycle comes from.

7:40 Let us now examine the individual phases of one cycle. In order to fully understand the course of this cycle, we will begin the discussion halfway through. So about two weeks after the first day of the cycle, the mature egg leaves the ovary. This is ovulation or ovulation. It will be picked up by the appendages of the fallopian tube and it will continue to flow smoothly down the fallopian tube towards the uterus. At the same time, the uterus prepares to receive a fertilized egg by thickening the walls and increasing blood supply. At this point, the question should be asked, but how does the uterus know if the egg is fertilized or not? The

8:33 problem is that it does not know, and each time, in each cycle, it prepares to receive a potentially fertilized egg each time . When the unfertilized egg reaches the uterus (which is the case in the vast majority of cycles) the uterus begins to contract and this excess membrane peels off, and along with the blood and the fertilized egg comes out through the vagina We started from the inside now let's discuss it again this time from the beginning. The first day of the cycle is the first day of menstrual bleeding

9:21 and lasts 3-7 days and during this time about 65 ml of secretion (that's glass) will be removed. Then we have the maturation of the egg (and the ovarian follicle) in which this maturation takes place, secretes estrogens that are designed to regenerate the uterine mucosa (it was just bleeding, so it needs to be rebuilt) . the phase of relative infertility - because its length is variable. The next phase is ovulation or ovulation, i.e. the release of the egg from the ovarian follicle (called the Graaf's follicle).

10:13 We are just in the middle of the cycle - and the egg is soon going to the fallopian tube. The empty ovarian follicle turns into a corpus luteum, which produces progesterone, which causes thickening and improves the blood supply to the uterine wall. If fertilization does not take place within 24 hours, the egg cell dies and we begin the infertility phase, which lasts until the last day before bleeding. There is little time for fertilization, therefore, only 24 hours. However, because sperm can survive in the female genital tract for even a week

11:01 , they can wait for an egg, and if we add to this irregularity in the appearance of ovulation (ovulation), the fertile phase is 4 days before ovulation and 5 days after. Thank you for your attention because you ask me in great numbers in the comments for greetings, here they are…. Meanwhile, fruitful learning and until the next time.