by: Admin_LouisPosted on: The structure labelled 4 is for The structure labelled 4 is for A feeding B attachment C excretion D respirationAnswer is B Share this:TwitterFacebookLike this:Like Loading... Related posts:Sting cells are normally found inThe gill rakers of fishes take part inWhich of the following can bring about the greatest increase in the rate of transpiration?Which of the following vertebrae lacks a centrum?