Appointment and learns that her baby weighs about 9 ounces and is covered with lanugo. she has felt some slight movements from the baby recently. about how many weeks along is she in her pregnancy?
a.28 weeks
b.20 weeks
c.10 weeks
d.16 weeks

The correct answer is option B.20 weeks.

Explanation:

By week 20 the mother will already find a pregnancy in half way, remember that a pregnancy lasts 40 weeks.

At this stage the baby's facial features begin to take shape, and the baby begins to develop a sleep-wake cycle. Another feature is that it will probably start sucking its finger.

It is possible that the mother already begins to feel slight movements from her baby in week 20, which should be weighing between 9 and 11 ounces of pounds.

For this week, the baby's skin is covered with an amniotic fluid and a waxy covering that is called vernix.

This vernix is associated with the lanugo, which helps it maintain and is a type of fine and soft hair.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.