Which of the following does not occur within the first four weeks after fertilization? a. the spinal cord and central nervous system are developing. b. the digestive system is developing. c. fingers and toes can move. d. heart and lungs have developed.

you may having too much sleep.. a good night sleep consists of about 7 hours. more than that could be the reason you're still tired throughout the day.

abuse, both physical and emotional. messes with your head. makes you feel like nothing, no matter what anyone else tells you