Explanation

Looking at the given numbers, we can see that they are all prime numbers.

- The next prime number after 41 is 43. So, the missing number in the series is 43.

Therefore, the completed series is: 11, 13, 17, 19, 23, 29, 31, 37, 41, 43.

Additional information:

- Prime numbers are natural numbers greater than 1 that have no positive divisors other than 1 and themselves.