Marcelo Rice

Biology

9 January, 18:04

What causes menstrual flow? Fill in the blank and separate each word with a comma in the

answer box.

When the corpus blank

ceases to function, concentrations of blank

and blank

rapidly blank

and in response, blood vessels in the endometrium

constrict. This reduces the supply of oxygen and nutrients to the thickened blank

and these lining tissues soon disintegrate and slough off. At the same

time, blood leaves blank

capillaries, creating a blank

of blood and cellular

debris that passes through the vagina as menstrual flow.