Are the eight directions and their deities associated with eight orifices of body? If so, can someone please list the deities associated with each of the orifices, and their associated organs?
From this answer, we know which deity rules over which direction.
Kubera (North) Yama (South) Indra (East) Varuṇa (West) Īśāna (Northeast) Agni (Southeast) Vayu (Northwest) Nirṛti (Southwest)
Now, in our head we have 7 (8 if we count the Brahmarandhra) orifices viz - mouth, 2 eyes, 2 nostrils, 2 ears.
And, the organs of procreation and excretion are the 8th and 9th orifice. That means we have in all 9 orifices in our body (leaving aside the Brahmrandhra).
Aitareyopanishad (which is linked to the Rig Veda) gives associations of these senses with deities as follows:
I-i-4: He deliberated with regard to Him (i.e. Virat of the human form). As He (i.e. Virat) was being deliberated on, His (i.e. Virat'’) mouth parted, just as an egg does. From the mouth emerged speech; from speech came Fire. The nostrils parted; from the nostrils came out the sense of smell; from the sense of smell came Vayu (Air). The two eyes parted; from the eyes emerged the sense of sight; from the sense of sight came the Sun. The two ears parted; from the ears came the sense of hearing; from the sense of hearing came the Directions. The skin emerged; from the skin came out hair (i.e. the sense of touch associated with hair); from the sense of touch came the Herbs and Trees. The heart took shape;
from the heart issued the internal organ (mind); from the internal organ came the Moon. The navel parted; from the navel came out the organ of ejection; from the organ of ejection issued Death. The seat of the procreative organ parted; from that came the procreative organ; from the procreative organ came out Water.
Thus we have the following associations:
Mouth -- Agni
Eyes -- Sun
Nostrils -- Vayu
Ears -- Directions
Genitals -- Water
Anus -- Yama.
Now, you can yourself see if the presiding deities are the same or not. By the way, some other Upanishad associates Prajapati with the genitals instead of Water.