In males, testes are contained in the scrotal sacs because (NCERT XII : 43)
1) it facilitates ejaculation
2) testes in the abdomen will hamper maturation of sperms
3) it provides temperatrues that is slightly lower than body temperature
4) other organs do not make space for the testes in the abdominal cavity
3) it provides temperatrues that is slightly lower than body temperature