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.
A man is does a dumbbell pullover at the gym. Photo Credit Click_and_Photo/iStock/Getty Images. Dumbbell pullovers are a bit of an exercise anomaly in that they work two opposing muscles simultaneously: the chest and the back muscles.The chest muscles are the primary movers, but several muscles of the back assist during the movement.econdary Movers. The latissimus dorsi, which is a large back muscle that fans out from your upper arm bone to your spine and then extends down to your hip bone, assists during the pullover exercise. Several other muscles, including the rhomboids, rear delts and triceps, are also involved as secondary movers.