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Many people associate the term "low-fat" with health or healthy foods. Some nutritious foods, such as fruits and vegetables, are naturally low in fat. However, processed low-fat foods often contain a lot of sugar and other unhealthy ingredients.
The circulation that disperses oxygen & rich blood throughout the body, is "Systematic Circulation."
To actually control the color of their skin, cephalopods Use tiny organs in their skin called chromatophores. Each tiny chromatophores is basically a sac filled with pigment, minute muscles tug on the sac, spreading it wide and exposing the colored pigment to any light hitting the skin.