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Did you know?

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 oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

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

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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Color-enhanced CT scan showing two malignant tumors in the brain. Color-enhanced CT scan showing two malignant tumors in the brain.
Temperature and Color Temperature and Color
Choose the telephone unit that offers the features needed in your office. Choose the telephone unit that offers the features needed in your office.
Color mixtures of refracted light—additive process. Color mixtures of refracted light—additive process.
Orbital Variations Orbital Variations
Segregation of alleles for seed color Segregation of alleles for seed color
Video: Electrical Conduction System of the Heart

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