It's not blood.
Endometrium, blood, and the ovum
The flow of blood and tissue cells from the uterus is called menstruation. During menstruation, the lining of the uterus sheds and is expelled through the vagina. This process is accompanied by the flow of blood, which is a mix of tissue cells, uterine lining, and blood from the ruptured blood vessels in the uterus.
Blood flows out of the uterus through the cervix and then out of the body through the vagina during menstruation.
It depends on what you mean by 'clean blood' during your period. Your menstrual flow isn't dirty so your blood should always be 'clean' during menstruation.
Menstrual flow refers to the shedding of the uterine lining that occurs during a woman's menstrual cycle. This blood is released through the vagina during menstruation, typically lasting for 3-7 days. The flow may vary in color and consistency throughout the menstrual period.
Uh.........menstruation.
The uterus lining deteriorates during menstruation. The menstrual flow is the uterine lining that is shedding after pregnancy does not occur.
It is the cycle of blood flow from a woman's vagina. In other words, your period.
During menstruation your body produces prostaglandins that cause the uterus to contract in order to push out menstrual flow, if prostaglandin production is too high it causes the blood vessels to contract so cutting off oxygen flow to the muscles in the uterus temporarily. Essentially it's similar to a heart attack: blocked blood vessels limiting blood flow and oxygen.
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.
A tampon is a type of menstrual product used by people who menstruate to manage menstrual flow. Tampons are inserted into the vagina during menstruation to absorb menstrual flow before it has a change to leave the body. Different people use different things to deal with their menstrual flow, people may use tampons or they may use different products like sanitary pads or menstrual cups.