Explanation:
It helps in the circulation of blood
The answer is convergent evolution.
<span>A convergent evolution is a process of independent evolution of similar traits in unrelated species. These traits are called analogous structures which are similar in form or function but were not present in the last common ancestor of those species. For example, both birds and bats have wings. However, wings were not present in the last common ancestor of tetrapod to which they belong. They are only similar in function and develop in response to the similar way of life.</span>
If you make a punnet square out of this, there is no possibility to have a recessive trait because neither parents have it plus dominant is always going to overrule recessive traits.
Answer:
Stomach - break down food
Small intestines - absorb all nutrients and seperate them from waste
Large Intestines - continue collecting any remaining nutrients and expell any waste