Complex sentence: These "fangs" typically point backwards rather than straight down, possess a groove which channels venom into the prey, and are located roughly halfway back in the mouth, which has lead to the vernacular name of "rear-fanged snakes".
Split into simpler sentences: These "fangs" typically point backwards rather than straight down, are located roughly halfway back in the mouth, and possess a groove which channels venom into the prey. The rearward location of the "fangs" has lead to the vernacular name of "rear-fanged snakes".