The average life of a human red blood cell (erythrocyte) is 120 days. In humans, erythrocytes (red blood cells or RBCs) are functional on average 120 days.8 people found this useful. normal healthy white blood cell lives for approximately 12 hours. Whereas a healthy red blood cell lives for about 90 days. Although blood is produced from healthy bone marr â¦ ow and constantly producing new red and white blood cells.
The main muscle targeted by the dumbbell shoulder press is the anterior deltoid, or the front shoulder. To a slightly lesser degree, the exercise also hits the remaining deltoid muscles, including the lateral deltoid, or the outside of your shoulder, and posterior deltoid, or the back of your shoulder.
Shoulder Muscles. The deltoids are the muscles of your shoulder, which play a crucial role in rotating your arm. Strengthening these muscles will help you put more force in your wind-up, allowing you to throw the ball harder. Among the most effective shoulder-strengthening exercises are the standing military press, seated dumbbell press and upright rows.