One of the most remarkable examples of cell communication is the fight or flight response. body handle extraordinary situations. responses involved in the fight or flight response. place in the movie. 0:16 An environmental signal travels into the brain. a nerve impulse to the hypothalamus (not shown).
Umbilical cord. In placental mammals, the umbilical cord (also called the navel string, birth cord or funiculus umbilicalis) is a conduit between the developing embryo or fetus and the placenta.
The umbilical cord connects a baby in the womb to its mother. It runs from an opening in your babyâs stomach to the placenta in the womb. The average cord is about 50cm (20 inches) long. The umbilical cord carries oxygen and nutrients from the placenta into your babyâs bloodstream. The umbilical cord is made up of: one vein that carries blood rich in oxygen and nutrients from you to your baby.