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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Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
functional groups of biomolecules
Functional groups
(a) Savanna baboons live in female-philopatric groups, among which males migrate. (b) Chimpanzees li