List possible limitations to scientific models

Wich organism obtains its energy from dead or decaying matter

Cpr, or cardiopulmonary resuscitation, is a first-aid technique to save lives. it involves compressions of the patient's chest cavity. which description is the best description of the functions of chest compressions in cpr? chest compressions are done to pump the heart. chest compressions are done to strengthen the rib bones. chest compressions increase carbon dioxide inhalation. chest compressions allow the patient's muscles to wake up.

This connective tissue consists of large round densely packed cells with the nucleus pushed to one side.