Name the numbered structures and provide their function

1 : Pituitary Gland - an endocrine organ that releases a variety of vital homeostatic hormones

2 : Optic Chiasma - the area where the optic nerves cross over

3 : Fornix - an element of the Limbic system , our emotional brain

4 : Choroid Villi - part of the epithalamus ; it creates the cerebrospinal fluid in the lateral ventricles

5 : Corpora Quadragimini - contains the visual and auditory reflex centers

What are the two subdivisions of # 5?

Superior colliculi and inferior colliculi

What structure is located immediately behind # 1 and what is the function ?

Mamilary bodies ; they are important olfactorey relay nuclei and feed into Limbic system