I believe aluminum is the easiest material to recycle.
Answer:
Left atrium
Explanation:
The four pulmonary veins return oxygenated blood to the left atrium.
The correct answer is 2500 kcal/day.
During the first trimester of pregnancy, the daily energy requirements of the pregnant woman are the same as before the pregnancy. During the second and third trimester, the body's nutritional needs increase and the daily energy requirements increase by 300 calories.
