The umbilical cord is a narrow tube-like structure that connects the developing baby to the placenta. The cord is sometimes called the baby's “supply line” because it carries the baby's blood back and forth, between the baby and the placenta.
Umbilical cord. A rope-like cord connecting the fetus to the placenta. The umbilical cord contains 2 arteries and a vein. It carries oxygen and nutrients to the fetus ...
“A body will stay at rest or in uniform motion unless acted upon by unbalanced forces” this is Newton’s first law of motion, and is most commonly referred to in physics
