What happens to the uterine lining between day 27 and day 1, what is this process called?

The menstrual cycle refers to the monthly natural changes that occur in women of reproductive stage. The changes occur majorly in the ovaries and the uterus and is the basis for pregnancy in women. The menstrual cycle normally runs for twenty eight [28] days. The cycle involves the building up of uterus lining to receive fertilized eggs and its eventual break down when no egg is fertilized.

Between day 27 and day 1 of the cycle, THE UTERINE LINING BREAKS DOWN AND THIS PROCESS IS CALLED MENSTRUATION.

meiosis is the correct answer

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.