Answer:OC.Beta-adrenergic receptor blockers
Explanation:
The human heart has four chambers, which are the left and right atria and the left and right ventricles. Blood enters the right atrium where it then passes through the right ventricle.
Answer:
cell is the structural and functional unit of life because our body is made up of millions of cells and it helps to control the structural and functional unit of our body
"<u>THE FLU</u>"
According to the lesson the flu symptoms are more severe than the common cold. In addition to respiratory difficulties (sneezing, coughing, sore throat), the victim will also suffer from fatigue.
However Symptoms of the common cold may include runny nose, sneezing, congestion, coughing, sore throat, fever, and achy muscles.
The common cold doesn't have "fatigue" but the flu does.