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Where are gametes produced in the male and female reproductive system

Published: 02.07.2022

where are gametes produced in the male and female reproductive system

STRUCTURE OF THE SPERM

Spermatozoa are sex cells or male gametes produced in the seminiferous tubules of the testicles ; its main function is to combine its DNA (genetic information) with that of the ovum (female gamete), in order to create a new individual, where are gametes produced in the male and female reproductive system.

Parts of the spermatozoon

As can be seen in this seme of the spermatozoon, three main parts are identified in the male gametes:

Head: consists of a nucleus and in its upper part or tip there is a thicker area called an acrosome responsible for perforating the membrane of the ovule to aieve fertilization. The sperm head contains DNA that, when combined with that of the female gamete, will create the human egg or zygote.

Midportion: elongated body with a large number of mitoondria, organelles that provide energy for movement.

Tail: also called flagellum, it is a whip-shaped appendage that allows these sex cells to move in the seminal fluid, in order to rea the uterus and the uterus. fallopian tube into the female reproductive tract and fertilize the egg. The tail is divided into a main piece (whi is what gives mobility) and a terminal piece.

Life of the spermatozoa

Since the man reaes puberty, the spermatozoa are continuously formed from stem cells located in the seminiferous tubules of the testicles, where they remain for 10 weeks until they mature and, if not expelled, they break down and are reabsorbed by the body.

For spermatozoa to survive outside the male, they need specific conditions:

Instead, the life of sperm in a woman's body may be prolonged. If the male has ejaculation inside the vagina, they live from 2 to 16 hours inside it, a range that varies because, outside the ovulatory period, this is a hostile environment for them, since the pH vaginal is usually less than 6, while at ovulation it increases 1 to 1.5 points, reaing the 7 to 7.5 points they need to survive.

It is worth mentioning that after reaing the fallopian tubes they can live up to 2 days waiting for ovulation, given that the temperature and acidity of this area is conducive to them and, upon coming into contact with the female gamete, the acrosome of the head of the spermatozoon facilitates the penetration of the ovum and fertilization is aieved.

How long does a sperm live?

There is no definitive answer to this question, since there are several factors that increase or decrease the life of spermatozoa,whi, as noted, include temperature and pH, but also influence the presence of spermicides in the vagina or if the woman is consuming hormones, so after ejaculation, depending on the conditions that surround them, they can live for a few minutes (in contact with the air), up to three days (within women).

For this reason, rubbing between sexual organs does not cause pregnancy (although they can spread diseases, su as genital warts), while vaginal penetration, partial or comete, increases the risk, even when resort to intercourse interruption, since the preseminal fluid produced by the male's arousal may contain spermatozoa whi, finding a favorable environment in the vagina, move in sear of of the ovule to aieve its fertilization.

Published: 02.07.2022 | Исправлено: 02.07.2022



Настенька Ликсо
02.07.2022 в 11:44
Некоторые эксперты более благосклонно относятся к стоимостным компаниям, избегая при этом типично растущих компаний. - С учетом короткого горизонта я бы сосредоточился в первую очередь на стоимостных компаниях, не обязательно концентрируясь на конкретных секторах или отраслях, а анализируя каждую компанию в отдельности. При создании портфеля, который может иссякнуть во второй половине года, я бы сосредоточился в первую очередь на избранных дивидендных компаниях, подходя к растущим компаниям с большей осторожностью. Кроме того, текущая конъюнктура должна, скорее, продолжать поддерживать показатели компаний ТЭК, которые не всегда могут предложить привлекательные дивиденды, но имеют шанс показать себя лучше рынка в ближайшие месяцы, считает Камил Хайдамович, специалист по управлению рисками инвестиционных продуктов. управляющий Santander Bank of Poland. При этом он советует избегать нескольких секторов. - Я бы осторожно относился к банкам, хотя некоторые из них могут показать положительные результаты выше среднего, связанные с текущим направлением процентных ставок. Кроме того, я бы не стал избегать компаний из розничного сектора, а сосредоточился бы на дистрибуции товаров первой необходимости, где мы не должны увидеть столь сильного сокращения потребительских расходов. Однако все дело времени. Учитывая масштаб последней распродажи, если бы меня не интересовали убытки за 12 месяцев, портфель для долгосрочной прибыли выглядел бы совсем по-другому, указывает он.

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