Which of the following occurs during the embryonic stage? a. the zygote implants itself in the uterine wall. b. the fetus reaches full term and is ready to be born. c. the vital organs and bodily systems begin to form. d. the fetus’ footprints and fingerprints begin to form.

The three major stages of prenatal development are germinal, embryonic, and fetal. The embryonic stage occurs during the third to eighth weeks of pregnancy. The zygote implants itself in the uterine wall also the formation of the placenta occurs during this stage. Correct A In this stage also the neural tube, which forms the brain and spinal cord, begin to develop.

answer(b) keep oxygenated and deoxygenated blood separate;

untreated gonorrhea can lead to significant complications, such as: infertility in women. untreated gonorrhea can spread into the uterus and fallopian tubes, causing pelvic inflammatory disease (pid), which may result in scarring of the tubes, greater risk of pregnancy complications and infertility