Question

define menstruation briefly

Answer 1

Menstruation, also known as a period or monthly,is the regular discharge of blood and mucosal tissue (known as menses) from the inner lining of the uterus through the vagina.

Answer 2

HEYA HERE IS YOUR ANSWER

The uterus prepares itself every month to receive fertilised egg .
The lining of the uterus becomes thick and spongy, required to support the embryo
When fertilisation had not taken place, this lining is not needed longer
This lining breaks and comes out through vagina as blood and mucus.
This cycle takes around 28 days every month and called menstrution