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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.
Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
![The tundra at the base of the Torngat mountains in Labrador consists primarily of low-growing mosses](https://biology-forums.com/gallery/47/medium_33_27_08_11_11_56_24_15451996.jpeg)
![The testes. In addition to producing sperm, the testes secrete the male sex hormones, primarily test](https://biology-forums.com/gallery/47/medium_14755_28_08_12_1_42_28_8238159.jpeg)