If the position of a body is not changing with respect to a given frame of reference, the body is said to be at rest, motionless, immobile, stationary, or to have constant (time-invariant) position. An object's motion cannot change unless it is acted upon by a force, as described.
Giardia in Humans. Giardia is a microscopic parasite responsible for the diarrhea-related illness giardiasis. Also known as Giardia intestinalis or Giardia lamblia, this organism begins to multiply within the intestines after a person becomes infected.For more details on symptoms of giardiasis, treatment options, and different ways in which humans can become infected with this parasite, click Giardia.).
How to Recognize the Symptoms of Giardiasis. Two Parts: Recognizing Symptoms Understanding Giardiasis Community Q&A. Giardiasis, one of the most common intestinal parasites that affect humans, is caused by a microscopic parasite (Giardia lamblia) which lives in the intestines of people and animals.