Answer:
Step-by-step explanation:
Digestive system is a long tube that involve in the breakdown of large particles of food into small particles for easy absorbption of nutrients.
The digestive system of humans and rats are somewhat similar but there are some differences.
GALLBLADDER
The human digestive system has Gallbladder because they take in large portion of fatty substances
while the rats digestive system does not have GALLBLADDER because they do not take in large portion of fatty substances.
LARGE INTESTINE.
Rats digestive system have large intestine Caecum which help them ferment grains and seeds they consumed. But humans digestive system does not have large intestine.
The rat digestive system evolve in this way for the survival of rats. Because rats Don't consume more of fats they don't of gallbladder which help in fats digestion.
Their enlarge large intestine or Caecum is important for fermentation of grains and seeds they consume.