Experts estimate that obesity decreases a person life span by ______ years

Marisa is at a point in her pregnancy when the blastocyst is moving down to her uterus, and the placenta begins to form. Which stage of prenatal development is Marisa currently experiencing?

A) fetal B) embryonic C) placental D) germinal

White blood cells, also called lymphocytes, are responsible for the immune system's ability to fight off viruses and bacteria, among other foreign threats to our body's health

Indicate whether this statement is true or false.