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?
Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
Did you know?
Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
Did you know?
Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Examples of asexual reproduction.
Life of a Medical School Student
W. A. Rogers’s engraving, “Out of the Game,” showed one injured boy tending to another. It appeared
Cellulose and chitin are examples of structural polysaccharides
Examples of Cuneiform Writing
Examples of Sequenced Genomes