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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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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

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Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

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People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Margination, diapedesis, and chemotaxis of white blood cells Margination, diapedesis, and chemotaxis of white blood cells
Regulation of Blood pH and Gases Regulation of Blood pH and Gases
The heart: (a) coronary arteries and veins The heart: (a) coronary arteries and veins
White Blood Cells Involved in Immune Response White Blood Cells Involved in Immune Response
Electrical Conduction System of the Heart Electrical Conduction System of the Heart
Change in Blood Pressure through the Systemic Circuit Change in Blood Pressure through the Systemic Circuit
Video: Homeostasis (range of body conditions, normal limits, mild stresses & severe stresses)

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