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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?
Cyanide works by making the human body unable to use oxygen.
Did you know?
If you could remove all of your skin, it would weigh up to 5 pounds.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
On average, the stomach produces 2 L of hydrochloric acid per day.