Sperms aren't the mindless, flagellumwielding,dolts you thought they were. They are wily little devils with war on their nuclei. Music Hey dudes, Trace here with the lowdown onyour sperms' struggles for DNews. Sperm are the male gamete, the counterpart to thefemale's egg. When a sperm reaches the inside of an egg, a zygote is created the firststep on the path to a fetus. But to reach that goal, a sperm have to overcome a lot of different problems one being there are millions of other sperm. They're like, WATCH OUTDUDE. Imma tryin' to get to the egg!
For instance, we've evolved what science callssperm alloion. As the point of sex is to get your sperm to the egg first and thus spreadyour genes, sperm alloion was one of nature's ways of getting the most bang for your . buck.IF a male believes his female sexual partner has committed infidelity, or if he's simplyspent a long while away from the partner, his sperm count will increase when they pairup! The authors of a study publishedCurrent DirectionsPsychological Science believethis is why males get lustful feelings after being away from their partner; they want tomake sure they can get as much spermthere
as possible to come. Once inside the woman, sperm continue thestruggle. This has to do with that creation: sperm are formed based on HOW the speciesfertilize AND how much sexual comition is present. It was assumed that the biggerthe sperm, the faster they are. Bigger and stronger is betteré Righté Wrong. A studypublishedthe journal Evolution uses Bonobos as an example. These apes share almost 99percentof their DNA with humans and have a lot of sex with lots of partners. The comitionhas evolved sperm with bigger head and a smaller tails. The larger sperm were actually SLOWER.
The researchers found only animals who fertilizeOUTSIDE of their bodies have a large sperm advantage. The shorter head and longer tailof fish and squid sperm were super fast and thus got to the egg first. Yah bro! Then there's the theory that there are twokinds of sperm the goal scorers, and the ones who play defense. Â Of the 250 millionsperm cells released into the female reproductive system, 27percent are defective, right offthe bat. The normally ovalshaped head is spherical or quite pointyparts, the tailsare malformed or whatever. This theory of so called quot;kamikaze spermquot; also comesback to comition between mates. The idea
is that these malformed sperm hang back toblock those from coming mates, thus ensuring the first male's DOMINATION OF FERTILIZATION!!! Since the hypothesis was proposedthe 80s,scientists have tried and failed to reproduce their findings, so while we're pretty surethis isn't real, it's still being tested. Most scientists now believe the 27percentdefect rate occurs because of poor quality controlsperm creation. Which. is alittle embarrassing. Dudes, this is our big moment and we're halfassing it out there!110percent, c'mon! Of the millions of sperms released, remember you were the fastest.
So tell us your strategiesthe big empty white box below and subscribe! Also, double check you're still followingus on Twitter AtDNews. We made some changes. You can get behind the scenes pictures and cool stuff that nevermakes it into an episode. Thanks!.
Dilation and Curettage D C Surgery PreOp Patient Engagement and Eduion
youtu.beJiaqOtVna1g Your has recommended that you undergoa Dilation and Curettage, or D and C. But what does that actually meané The uterus is part of a woman's reproductivesystem. It's the organ that contains the growing fetus. The cervix forms the neck of the uterus, and the vagina is the canal through whichconception and birth take place. The endometrium is a soft lining that protectsthe fetus during pregnancy.
Reasons for having a D and C vary. Most Dand C's are performed because the patient has complained of unusually heavy menstrualbleeding. Other common problems include, uterine infection,bleeding after sexual intercourse, incomplete miscarriage or the presence of polyps small pieces ofextra tissue growing on the inside of the uterine wall. Then the surgeon will use a gloved hand toconduct a vaginal examination and will check the size and loion of the uterus by pressingon your lower abdomen.
A metal or plastic vaginal speculum is usedto gently expand the vagina and allow access to the cervix. Once the cervix is visible, a forcep is usedto grasp the front lip of the cervix causing the uterus to open a little. Using a blunttipped probe, the surgeon carefullymeasures the length of the uterus and takes a small sample of tissue from the cervicalcanal. Next, the surgeon will dilate, or open thecervix, using a series of progressively larger metal rods called dilators.
When the cervix has expanded sufficiently,the will use a spoonshaped instrument called a curette to gently scrape out thelining of the uterus. In some cases, surge When the entire lining of the uterus has beenremoved, the instruments are withawn. The tissue removed will then be sent to alaboratory for analysis.