D or A (these are one of the right question)
The process of removing toxic substances or qualities.
A black coat appears black because it absorbs all the wavelengths of visual light that fall on it and no light is reflected into the eye from that object.
There are systems in your body that do interesting things but the skeletal system and the muscular system help move your body
Both heart attack and heart failure are serious cardiovascular conditions. A heart attack is blockage of blood flow to the heart and occurs when the blood flow that brings oxygen to the heart muscle is severely reduced or cut off completely. The heart attack is acute and sudden and causes a lot of chest pain . Heart failure on the other hand occurs when the heart cannot circulate blood through the body and is a chronic progressive process. According these explanations the following statement is true: Heart tissue dies during a heart attack, while heart failure results in systemic oxygen deficiency. Correct answer: C