Final answer:
The recto-uterine space is alternatively known as the posterior cul-de-sac or more commonly as the Pouch of Douglas.
Step-by-step explanation:
The alternative term for the recto-uterine space is the posterior cul-de-sac. However, it is most commonly known as the Pouch of Douglas, which is the space between the rectum and the posterior wall of the uterus in the female pelvic cavity. Regarding another cavity, which contains a component of the central nervous system, the correct answer is the cranial cavity. The pelvic space is divided into two main regions: the greater pelvis (or false pelvis) and the lesser pelvis (or true pelvis), separated by the pelvic brim or pelvic inlet.