Chapter 19 Flashcards
Summarize the events that occur during the first week after fertilization?
The fertilized egg undergoes many cells divisions and travels to the uterus.
Describe the structure that protect and nourish the embryo and the fetus
The amniotic sac, placenta and umbilical cord protect and nourish the develops embryos and later the fetus
Zygote
The united egg and sperm
Embryo
From the two-cell stage until about nine weeks after fertilization
Blastocyst
No longer a solid mass of cells, but a sphere of cells surrounding a hollow center
Implantation
Once the blastocyst forms it begins to attach itself to the wall of the uterus
Amniotic sac
A fluid filled bag of thin tissue
Placenta
The attachment holding the embryo to the wall of the uterus
Umbilical cord
About 25 days after fertilization. Develops between the embryo and placenta
Fetus
From the third month until birth, the developing human
Identify four behaviors that are essential for a healthy pregnancy
Getting proper nutrition, exercise, avoiding drugs and environmental hazards
Explain the importance of prenatal care throughout pregnancy?
The chances of having a healthy baby greatly increase if the mother visits her doctor or clinic for regular checkups throughout her pregnancy
Prenatal care
Medical care during pregnancy
Obstetrician
A doctor specialized in pregnancy and child birth
Trimester
A pregnancy is divided into three periods of time. (3 months long)