Answer::: Brain structures called the hypothalamus and pituitary gland control the menstrual cycle. The hypothalamus triggers the pituitary gland to make hormones that trigger the ovaries to make oestrogen and progesterone. ... Disorders of the hypothalamus, pituitary gland or ovaries can affect menstruation, causing amenorrhoea

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3 years ago

Consider the mammalian heart. why is the muscular wall of the left ventricle thicker than that of the right ventricle? the left

Julli [10]

The left ventricle must contract with more force in order to send blood to the body's extremities

I hope this helps! I'm happy to answer any other questions you might have :)

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3 years ago

What does the fossil record reveal about new species of organisms? They evolved over time from older species. They changed into

SVEN [57.7K]

They evolved over time from older species.<span>
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3 years ago

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If a plant cell had a mutation such that the leaves were orange in summer, which part of the chloroplast would be different, com

velikii [3]

The answer u r looking for is- thylakoids. ;)

7 0

3 years ago