yes
Yes it is. You are passing the old lining of the uterus.
That's normal. It's the pieces of the uterus lining coming out.
The results are said to be normal if the lining of the colon is a pale reddish pink and no abnormal looking masses are found in the lining of the colon.
The large chunks of blood during your period is actually uterine lining, and this is perfectly normal. The main waste product during menstruation is the uterine lining, you can see this as chunks in your menstrual flow that may look similar to raw liver.
No if you are pregnant the uterus is closed so the lining is still in there. Some spotting can still be during the pregnancie though but not heavy bleeding. If you are worried go to your doctor.
The ones with the shortest (normal) lifespans - like skin & the lining of the gut.
No, you do not ovulate during pregnancy. The reason you menstruate is because you have a egg that is not fertilized. That egg along with the lining of the uterus comes out during menstruation. During pregnancy the uterus is closed to protect the fetus and you do not ovulate or menstruate.
The tissue that you see in your menstrual flow isn't skin, it is most likely the uterine lining. It's normal to see larger pieces of uterus lining being shed in your menstrual flow on heavier days of your period.
Menstrual blood doesn't clot like other blood because if it did it would be detrimental to the whole process of the uterine lining shedding. The 'clots' people talk about in menstrual flow are normally larger chunks of the uterine lining, normal during heavier flow days.
It is a normal finding of the lining cells of the bladder EP=epithelial
This is normal and natural. http://en.wikipedia.org/wiki/Menstruation
What you are seeing as clots are probably not clots at all, after all menstrual blood doesn't clot like normal blood as if it did it would be detrimental to the whole process - you're likely seeing either blood mixing with cervical mucus, or larger pieces of uterus lining (you can tell which by pressing on them, if they don't break apart they are more likely to be lining). This is normal during the heavier points in your cycle, it's just normal menstrual flow.