A dogs skin is 3-5 cells thick however in humans it is at least 10-15 cells thick.
When hair grows in a canine it grows in bundles. When a human hair develops it grows as a solitary hair
Human continues to grow unlike dog’s hair which grows in cycles
Dogs can hear in frequencies ranging from around 40 Hz to 60 kHz,
Humans can hear in frequencies ranging from 12 Hz to 20 kHz (give or take
dogs can hear sound up to four times farther than us humans.
The olfactory cortex is the part of their brain that enables them to have superior smelling capabilities. The olfactory cortex is fourty times bigger in dogs than it is in humans and up to 100 million times more sensitive
Dogs use their wet noses to detect what direction a smell is coming from. I personally dont know an humans that can do that.
The human nose can sense up to 4,000 to 10,000 different smells
dogs can sense around 30,000 to 100,000
A dogs colour vision range is similar to red-green colour blindness in humans
Human jaw- can move up and down side to side and in a rounded motion. Teeth are designed for grinding having a flatter surface.
Dog jaw- can only move up and down. The teeth are designed to crush dense objects, having a three root system and are solid and sharp.
Dogs raw food takes 4-6 hours to digest, humans take 1-2 hours
A Dogs digestive tract is 20-80cm, a humans digestive tract is 150
Dogs sleep 12 hours, humans 7-9