Home>Biology homework help>Anatomy homework help  1.This is the term given to the mass of cells that contains trophoblast cells and an inner mass of cells that implants within the endometrium:morula blastocyte cleavage mass Oocyte2.What is NOT a change to a mother’s organ systems during pregnancy?Increase in respiration rate increase urination and urgency decreased cardiac output decrease gastrointestinal motility leading to constipation3.This stage of the delivery is when crowning occurs?Expulsion Placental delivery