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Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

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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.

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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

The three dimensions of stream structure. The three dimensions of stream structure.
Comparative structure of arteries, capillaries, and veins. Comparative structure of arteries, capillaries, and veins.
Structure of the enzyme chymotrypsin, a globular protein Structure of the enzyme chymotrypsin, a globular protein
Human Structure Human Structure
Structure of the Dnmt3a heterotetramer complexed with a DNA 25-mer Structure of the Dnmt3a heterotetramer complexed with a DNA 25-mer
Lewis structure of (CH3)2CHOCH2CH2CH2OH Lewis structure of (CH3)2CHOCH2CH2CH2OH
Video: Dissociative Disorders (Part 1)

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