During implantation, the trophoblast erodes a path through the endometrium. maternal blood vessels in the endometrium are walled off from the blastocyst. inner cell mass begins to form the placenta. entire trophoblast becomes syncytial inner cell mass is temporarily deprived of nutrients

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.