|
|
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.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
![The four ways in which animals exchange heat with the environment are radiation, evaporation, convec](https://biology-forums.com/gallery/47/medium_33_29_07_11_3_08_22.jpeg)
![While numerous subspecies of the jaguar have been recognized, recent research suggests just three. G](https://biology-forums.com/gallery/47/medium_27638_22_04_12_9_37_20.jpeg)