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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Did you know?
Your heart beats over 36 million times a year.
Did you know?
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
Did you know?
Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.
![Bronfenbrenner’s model of the ecological-systems approach to studying development. He suggested that](https://biology-forums.com/gallery/47/medium_6_31_05_15_8_20_41_219701596.jpeg)
![The proportion of men and women with elevated blood pressure or taking hypertension medication incre](https://biology-forums.com/gallery/47/medium_102911_16_06_15_7_18_43_220301505.jpeg)