Explanation:
During implantation, the trophoblast differentiates into two distinct layers: the inner cytotrophoblast, and the outer syncytiotrophoblast.
Cystic fibrosis affects the cells that produce mucus, sweat, and digestive juices. It causes these fluids to become thick and sticky. They then plug up tubes, ducts, and passageways.
It is an inherited life-threatening disorder that damages the lungs and digestive system.
7000 chemicals. ..........
Answer:
What causes a stroke? A stroke is caused when blood flow to your brain is stopped or disrupted. There are 2 kinds of stroke: ischemic and hemorrhagic.
Explanation:
