How are amphibians able to mostly keep oxygenated and deoxygenated blood separated and prevent mixing in the ventricle?

The amphibians are able to keep mostly oxygenated and deoxygenated blood separated and prevent it from mixing in the ventricle is likely because of their intermediate circulatory system in which both atria has the role of dumping it through a single ventricle, making the oxygenated and deoxygenated blood to be separated and prevent it from mixing though sometimes it is less efficient because mixing sometimes occurs.

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."

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explanation: