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?
Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.
African bush (savanna) elephant in Etosha National Park, Namibia.
A farmer with a pitchfork, wearing a hat identifying him as a Granger, warns of an oncoming “Consoli
Eugène Delacroix, Liberty Leading the People.
Homeless people sleeping on the streets is a common sight in India’s cities. I took this photo in ...
People who share genes will often have similar body weights
People who are color-blind see colors differently. (a) Those with normal vision see the red leaves.