Oxygen enters the lungs, then passes through the alveoli and into the blood.
The answer is true and the reason why is because
Answer – Three Trimesters
The development a fetus occurs over three trimesters of pregnancy. The nine months gestational period in humans is divided into three stages of equal length; the first three months form the first trimester, the fourth to sixth months form the second trimester, and the seventh to ninth month form the third trimester.
<span>
</span>
