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.
The biceps are the muscles that bend your elbows and lift the dumbbells. The biceps begin on the scapula and end on the lower arm bone. Since the biceps cross the elbows, the elbow joint is used during the supinated dumbbell curl. The biceps shorten as the muscle contracts and when the muscle shortens the elbow flexes.