SEX .January 6, 2021
Organisms of many species are specialized into male and female varieties, each known as a sex. Sexual reproduction involves the combining and mixing of genetic traits: specialized cells known as gametes combine to form offspring that inherit traits from each parent. The gametes produced by an organism define its sex: males produce small gametes (e.g. spermatozoa, or sperm, in animals) while females produce large gametes (ova, or egg cells). Individual organisms which produce both male and female gametes are termed hermaphroditic. Gametes can be identical in form and function (known as isogamy), but, in many cases, an asymmetry has evolved such that two different types of gametes (heterogametes) exist (known as anisogamy).
Physical differences are often associated with the different sexes of an organism; these sexual dimorphisms can reflect the different reproductive pressures the sexes experience. For instance, mate choice and sexual selection can accelerate the evolution of physical differences between the sexes.
Sexual dimorphism :
Many animals and some plants have differences between the male and female sexes in size and appearance, a phenomenon called sexual dimorphism. Sex differences in humans include, generally, a larger size and more body hair in men; women have breasts, wider hips, and a higher body fat percentage. In other species, the differences may be more extreme, such as differences in coloration or bodyweight.
Mushrooms are produced as part of fungal sexual reproduction
Is sex important in life :
Sex is an important part of life and overall well-being. In relationships, orgasms play a significant part in bonding. Physical and emotional benefits like reduced risk of heart disease, improved self-esteem, and more can come from having sex. You can still have similar benefits without sex.
Is sex good for health :
A good sex life is good for your heart. Besides being a great way to raise your heart rate, sex helps keep your estrogen and testosterone levels in balance. “When either one of those is low you begin to get lots of problems, like osteoporosis and even heart disease,” Pinzone says. Having sex more often may help.
Is it OK to have sex everyday :
It’s it Normal to have sex everyday ? Whatever amount of sex you want to have – whether it’s none at all or every day – is totally fine.
Why do we have sex :
Physical reasons: Pleasure, stress relief, exercise, sexual curiosity, or attraction to a person. Goal-based reasons: To make a baby, improve social status (for example, to become popular), or seek revenge. Emotional reasons: Love, commitment, or gratitude.
Can we have sex in periods :
Unless you’re especially squeamish, there’s no need to avoid sexual activity during your period. Though period sex can be a bit messy, it is safe. And, having sex when you’re menstruating can actually offer a few advantages, including relief from menstrual cramps. Read on to learn more about sex during your period.
Which age is best for sex :
For women, sex post 18 is the best decision and the right age as before this, their bodies are underdeveloped and still not ready to go through a major hormonal transformation. A study shows that women who have sex before the age of 17 are more likely to be depressed than those who have it post 17.
How many rounds of sex is normal :
The average time for each couple (that is, averaged across all the times they had sex) ranged from 33 seconds to 44 minutes. That’s an 80-fold difference. So it’s clear there’s no one “normal” amount of time to have sex. The average (median, technically) across all couples, though, was 5.4 minutes.
How long should a good sex last :
So how long should vaginal sex actually last? The sex therapists surveyed say that anywhere from 7 to 13 minutes is “desirable.”
What are the disadvantages of sex :
- The good news is, as long as both you and your partners are happy and comfortable, there’s really no such thing as too much sex.
- A lot of sex can cause a urinary tract or vaginal infection if you’re not careful.
- People with penises can experience physical symptoms as well.
- Communication with your partner is key.
Among humans and other mammals, males typically carry an X and a Y chromosome (XY), whereas females typically carry two X chromosomes (XX), which are a part of the XY sex-determination system. Other animals have various sex-determination systems, such as the ZW system in birds, the X0 system in insects, and various environmental systems, for example in reptiles and crustaceans. Fungi may also have more complex allelic mating systems, with sexes not accurately described as male, female, or hermaphroditic.
External links :
Sexat Wikipedia’s sister projects
- Definitions from Wiktionary
- Media from Wikimedia Commons
- News from Wikinews
- Quotations from Wikiquote
- Texts from Wikisource
- Textbooks from Wikibooks
- Resources from Wikiversity
- Human Sexual Differentiation by P. C. Sizonenko