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Did you know?
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Did you know?
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
![Organs of the urinary system. This illustration is an anterior view of a female with the abdominal w](https://biology-forums.com/gallery/47/medium_14755_26_10_12_5_19_54_95242243.jpeg)
![Lie prone with your head turned to one side. Put your arms out to your sides and bend your elbows at ...](https://biology-forums.com/gallery/27/medium_679044_04_04_17_12_45_52_27435464.jpeg)