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.).
Giardiasis is an infection in your small intestine. Itâs caused by a microscopic parasite called Giardia lamblia. Giardiasis spreads through contact with infected people. Pet dogs and cats also frequently contract giardia. You can also get giardiasis by eating contaminated food or drinking contaminated water.