To pass between maternal and fetal blood, substances must pass through the placental barrier, which consists of layers of each chorionic villus, plus the endothelium of the fetal capillaries in the villi.

Your two friends just told you what to order for them at the drive through fast food restaurant. you give the order but when the food comes about 10 minutes later, you don't remember what each of your friends ordered your memory of the order was in __ memory. a. semantic b. flashbulb c. long-term d. short-term i think i know but i'm not really sure