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.
Upper Body: 1  Bench Press (chest & arms): Lay on a flat or incline bench press station. Grip the barbell at shoulder-width, bring it down to your chest, then push back up to full arm extension. 2  Military Press (shoulders & arms): Done either sitting or standing, hold either a barbell or two dumbbells at shoulder-height.