|
|
Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.
![Administration of abdominal thrusts (the Heimlich maneuver) to (A) a conscious victim and (B) an unc](https://biology-forums.com/gallery/47/medium_14755_05_10_12_4_11_17_9267256.jpeg)
![This battery-powered tester uses light-emitting diodes (LEDs), meter lead terminals, and two small ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_1_36_28_29382646.png)