When the heart and a primitive circulatory system will form in the middle layer of embryo cells?
a) during the first trimester
b) during the second trimester
c) during the third trimester
d) none of these
Explanation: the middle layer cells is mesoderm
Which of the following germ layer/s serve/s as the foundation for the baby’s bones, muscles, kidneys and much of the reproductive system?
a) the ectoderm
b) the mesoderm
c) the endoderm
d) all of these
When the neural tube along fetal back is closing and heart is pumping blood?
a) during the first trimester
b) during the second trimester
c) during the third trimester
d) none of these
Which of the following event/s occur/s during the first trimester?
a) basic facial features will begin to appear
b) passageways will make up the inner ear
c) arches will contribute to the jaw
d) all of these
Which of the following event/s occur/s during the first trimester?
a) the feotal body will take on a C-shaped curvature
b) small buds will soon become arms and legs
c) the nostrils become visible and eye lenses begin to form
d) all of these
Explanation: the arm buds now take on the shape of paddles. The arms and legs are growing longer, and fingers have begun to form
The pregnancy in which the embryo implants in any site other than uterus is called……..
a) tubal pregnancy
b) ectopic pregnancy
c) abnormal pregnancy
d) both a and b
Explanation: such pregnancy spontaneously aborts
