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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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In 1864, the first barbiturate (barbituric acid) was synthesized.

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Your heart beats over 36 million times a year.

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Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

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More than 4.4billion prescriptions were dispensed within the United States in 2016.

Chronic Renal Failure Chronic Renal Failure
Mechanism involved in renal control of blood pressure Mechanism involved in renal control of blood pressure
This graphic illustrates the original systems model of politics advanced by David Easton. Politics This graphic illustrates the original systems model of politics advanced by David Easton. Politics
Symporter protein in the loop of Henle: (a) normal reabsorption of inhibition of the Na+, K+, and ... Symporter protein in the loop of Henle: (a) normal reabsorption of inhibition of the Na+, K+, and ...
Renal blood vessels and the pathway of blood through the renal system. Renal blood vessels and the pathway of blood through the renal system.
Histology of a Renal Corpuscle Histology of a Renal Corpuscle
Video: Pneumonia Animation

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