Primates

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It probably seems like menstruation would be a big pain for other primates, right? If you're reading this post and you're a woman, chances are you've had to deal with "Aunt Flow" since your junior high days or even earlier, month after tiresome month, so it makes sense that you'd want to know just how other animals, including our non-human primate cousins cope. After all, it's not like they can just run on down to the pharmacy for supplies. But the thing to remember is that in the past, and even in some other 'natural fertility' groups today, women would typically get married at a much earlier age and spend most of their adult lives either pregnant or breastfeeding, both of which cause what's known as "secondary amenorrhea" (no periods), so they would actually have way fewer periods over the course of their lifetime than we experience. It's the same for other primates (monkeys, apes, lemurs etc.). When a female primate ovulates, odds are she'll also mate with one or more males and become pregnant. Think about it - it's not like non-human primates (in the wild) have access to birth control. And, like I mentioned above, the entire time a primate is pregnant and lactating she also is not menstruating since both are metabolically draining on the mother. Infant primates aren't fed jars of mushy baby food or given bottle formula, either, so they pretty much have to rely on mom's milk until they can possibly begin to find food on their own -- especially since food sharing is pretty darn rare in other animals. All of this means that primate babies end up nursing for what would seem to us like a really long period of time. By the time a baby primate is weaning and its mum can ovulate and mate again, odds are she'll also have a line of eager males waiting in the wings to start the whole cycle over again, thus preventing menstruation. When implantation does not occur in a given cycle(recall that the length of a female's cycle varies both between species and also within the members of a given species), however, then the endometrial tissue might be reabsorbed (so there's no external bleeding) or shed (see Strassman, 1996), although few mammals have as much menstrual bleeding as humans. So, as you can see menstruation is not something that would pose a huge problem for most non-human primates because it would be a relatively rare event. Finally, the fact that women in developed countries today menstruate so much is, as you can see, certainly not the "ancestral" pattern, and has been linked to a rise in many types of reproductive cancers.

1) Binocular/Stereoscopic vision - basically the orbits moved to the front of the head. This allows better judgment of distances for jumping, climbing and leaping within the trees.

2) ? (someone else?)

An invertebrate is any living thing with a spine or backbone. Primates are not invertebrates because they do have backbones.

Highly social

They have opposable thumbs and those are need for climbing.

Monkeys, Baboons and Gorilla's have spines that are shaped pretty much like humans

The Barbary Macaques of Gibraltar are the only population of wild monkeys in Europe.

They are New World monkeys, Old World monkeys and apes, and prosimians, the most primitive primates

The Gorilla is the largest living ape and primate overall. If you are looking for the largest monkey that would be the Baboon. Both of which live in Africa in the wild.

They have an oppasble thumbs

This is a very controversial subject. Some scientists believed that we evolved from apes, but I believe there's little evidence to this theory. Sure, both primates and humans have 'opposable thumbs', but no one has been able to prove that evolution exists. Scientists keep trying to create the so called 'missing link' between humans and primates. But if you think about it: why aren't there any nowadays? Where are all the 'half human, half apes'? I mean, you only see primates, and humans. Nothing in between, see where I'm at? And all the theories have ended up with people using pig teeth to form fake models. Everyone can be subject to their own opinion on the past, though.

Information about primates -- monkeys, humans, etc.

It's debatable. Some say Orangutang. Others say bonobo.

Because they do not have the attributes of a primate and do not meet the classification systems criteria for primates.

It is called a LEMUR

They have a hard penis...

All chimpanzees are primates but not all primates are chimpanzees. Humans, for instance, are primates.

it has a long tail to hold on to tress with and log fingers to do that aswell, i think!!

No humans do not have the largest diastema amongst the primate. Actually we have the smallest diastema compared to other primates such as gorillas, chimps, and orangutans. The reason being is because I learned in my bio class that in order for those apes to have fairly large canine teeth which is not only used for eating but also mainly for defending themselves they need to have a huge gap in between the incisors and canine teeth.

Between 300 and 400 primates depending on how you count. Some researchers don't always agree on whether two different populations should be considered different.

Yes, and that process is called hybridization. The animals are just required to be fairly close genetic relatives For instance, a lion and a tiger can mate to make a liger or a a tion. A zebra and a horse can be mated to produce a zebroid, and there are many more.

that is not funny, no they can not mate, unlike human they are very picky