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3ESO Male reproductive system - Contenido educativo

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Subido el 12 de abril de 2021 por Marta G.

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Did you know that men could produce 500,000 spermatozoa during their whole life? Or that 00:00:00
their penis could be reduced nearly two centimeters because of tobacco? And also 00:00:09
penis could break. We're going to learn many things interesting about the male reproductive 00:00:15
system we're gonna focus today on the reproductive systems for male and for females you need to know 00:00:24
that for both of them we have organs that we call gonads and we have cells that we call gametes 00:00:41
if you are thinking for example of the espermatozoa and the ovum you are thinking of the cell 00:00:48
but if you are thinking of the different parts like the testes or the ovaries you are thinking 00:00:53
of the gonads. With that, we start with point number three, male reproductive system. 00:01:00
In the male reproductive system, we have gonads and we have ganads. Which one are the gonads of 00:01:14
the male reproductive system? The testes, which in Spanish we call them testiculos. 00:01:21
These are going to be the principal part of the male reproductive system. 00:01:26
Why? Because the function of them is the production of spermatozoa. 00:01:32
Remember that reproduction, the main thing is that we have new individuals in our species. 00:01:37
So, the male needs to produce them, the spermatozoa, to get joined with the ovum. 00:01:44
So, this is the function. 00:01:52
Also, how is it made of? It is formed by some tubes, which we call seminiferous tubes, and they produce, on one side, spermatozoa, the gametes, the sexual cells, and androgens. 00:01:54
Androgens are sexual hormones. For example, testosterone, that we studied when we saw the endocrine system, is part of these sexual hormones. 00:02:11
The testes are very delicate, they need to be taken care of, so they are covered by a layer of skin which is called the scrotum. 00:02:23
However, this spermatozoa cannot get outside without any system that will carry them from the testes inside the female body. 00:02:36
How do they do that? By the reproductive tract. 00:02:46
The reproductive tract, they are going to be all the different vessels and all the different tubes 00:02:49
that are going to connect the testes with the outside world. 00:02:56
We have three different types. 00:02:59
We have the epididymis. 00:03:02
The function of the epididymis is going to be the migration of the spermatozoa. 00:03:05
continuing the way from the testes to the outside we have the ductus deferens 00:03:11
in the ductus deferens the spermatozoa which are mature are going to be stored and they are going 00:03:19
to wait there until they need to get out the final tube is the urethra we sew it in the urinary 00:03:25
system in the male it has a the same tube the one that take the urine out of the body and the 00:03:34
spermatozoa out the urethra is the last part and it takes the spermatozoa out of the body 00:03:41
although the penis is the part that we see from the male reproductive system as you have seen 00:03:50
it's not the only part that we have but how is the penis made of imagine that we cut the penis 00:03:56
in half okay and we see it the inside of it we'll see something like the outer layer will be a layer 00:04:03
of skin then we have a layer of connective tissue which is going to give support to the penis and 00:04:12
inside we have three different tubes these two the corpora cavernosa are those ones which are 00:04:20
the erectile tissue those ones are the ones that can provoke duration because here are full of 00:04:28
blood vessels and when the blood gets into the corpora cavernosa the penis is going to get bigger 00:04:36
and it's going to be erectile these two underneath we have a spongy tissue which recovers the urethra 00:04:46
and as we said in the urethra is the tube that the red soa are going to pass by to get outside 00:04:55
also in the penis at the end of the penis there are two parts we have the glands the glands is the 00:05:05
most upper part of the penis and usually is recovered but is covered by the foreskin 00:05:13
which in Spanish is called prepucio. In some cultures, like for example Jewish culture, 00:05:21
it's a tradition that they have to cut the foreskin when the baby is born. In our tradition 00:05:27
in Spain, we don't have that tradition, most of us, but what happens if the man can have problems 00:05:35
if the foreskin doesn't go backwards enough and in this case the doctor will have to cut the foreskin 00:05:44
in the male reproductive system there are also some gland accessory glands which are responsible 00:05:55
to produce some substances which are going to help the espermatozoa to get to the ovum 00:06:01
we have three different glands, we have the seminal vesicles, the prostate and the copper glands 00:06:08
the seminal vesicles are behind the bladder, they are going to produce spermatic fluid 00:06:15
and this spermatic fluid is a substance which is going to have nutrients for the sperm 00:06:22
remember that spermatozoa are cells, we have gametes which are cells and these cells need 00:06:30
to get some energy to travel to go swimming up to the oval so these nutrients come from the 00:06:37
spermatic fluid the prostate is below the bladder it's going to secrete prostatic fluid what does 00:06:43
it do it protects against against the vagina's acidity the vagina we're going to see it when 00:06:52
we study the female reproductive system is a very acid place because it's open to the outside world 00:06:58
and we cannot get bacteria viruses get inside the the reproductive system get to the ovaries and 00:07:05
have a chaos there to do so there is an acid environment where bacteria cannot survive 00:07:13
but if bacteria cannot survive espermatozoa will die also when they get into the vagina 00:07:20
how is it sorted out with this prostatic fluid this prostatic fluid gives this protection against 00:07:26
this vagina's acidity the copper glands are on the base of the penis they are going to create 00:07:32
a lubricating fluid what is the purpose of this lubricating fluid if we have a sexual intercourse 00:07:39
meaning male and female get together then we need some fluids that are going to help the 00:07:48
penis get into the vagina if that doesn't happen then it soars a female don't want to have sex 00:07:55
men will be hurt also how do we sort it out with lubrification there's a lot of lubrification in 00:08:04
the vagina but also the penis has its own lubrificating fluid which are the copper glands 00:08:12
now with all the information that you have we have seen that the testes produce the spermatozoa 00:08:19
and we have some accessory glands that produce other fluids with all that mix we have the semen 00:08:26
the semen maybe you thought it was all the spermatozoa there but no they are not actually 00:08:33
only 10 percent of the semen are spermatozoa are cells that are going to travel to the ovum 00:08:39
The rest of it, what is it? 90% are nutrients. We say that the spermatozoa are living cells and they need nutrients, basically glucose, glucose to survive. We have neutralizing substances. If we do not have these neutralizing substances, the spermatozoa are going to die when they enter the vagina and also a mucous lubricant to facilitate the sexual intercourse. 00:08:47
Now you're gonna make a very beautiful drawing of the spermatozoa. Remember that you need to 00:09:18
do the drawing also of all the sexual reproductive system and see you next day! 00:09:24
Idioma/s:
en
Autor/es:
Marta Garcia Perez
Subido por:
Marta G.
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
57
Fecha:
12 de abril de 2021 - 8:25
Visibilidad:
Clave
Centro:
IES FORTUNY
Duración:
09′ 48″
Relación de aspecto:
1.78:1
Resolución:
1920x1080 píxeles
Tamaño:
598.42 MBytes

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