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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.
The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.
On average, the stomach produces 2 L of hydrochloric acid per day.
![Illustration showing how the primary breast tumor metastasized through the lymphatic and blood vesse](https://biology-forums.com/gallery/47/medium_14755_27_08_12_12_17_41_8191646.jpeg)
![The pituitary gland lies just underneath the brain. It is subdivided into anterior and posterior lob](https://biology-forums.com/gallery/47/medium_14755_28_08_12_1_42_27_82361629.jpeg)