Chapter 2 - Fetus Development Flashcards
Embryo at 4 weeks
- cephalocaudal development.
- arm buds.
- less distinct leg buds.
Cephalocaudal development
pattern of growth in which areas near the head develop earlier than areas farther from the head.
Face development from 5 - 8 weeks
- 5 weeks → nose, mouth, and palate begin to differentiate.
- 8 weeks → nose and mouth almost fully formed.
- cleft palate may develop.
Fetus at 9 weeks
- internal organs are present.
- sexual differentiation.
- fingers, toes, and nails are growing.
- spontaneous movements.
Major divisions of the brain can be seen at _______ & brain & lungs developed at
11 weeks; 28 weeks.
lower body growth accelerates, baby can kick & external genitalia are developed at ______.
at 16 weeks.
Fetus at 18 weeks
Covered with very fine hair (lanugo) and a greasy coating (vernix) that protects its skin.
Fetus at 28 weeks
Eyes can open, and move during REM sleep.
Fetal Movement
movement of limbs, fingers, head, eyes, at 5/6 weeks.
more active male fetuses =
more active infants.
swallowing reflex
promotes palate and digestive system development
Auditory system
at 28 weeks, fetus can hear and react to sounds.
hiccups occur at _____ weeks as a __________.
7 weeks; burping reflex.
the heart
- primitive heart forms at 4 weeks.
- basic adult structure is achieved at 11 weeks.
Facial expressions
at 18 weeks –> fetus can raise its eyebrows, wrinkle its forehead, and move its mouth.
