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.

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.