asked 197k views
4 votes
What maintains the concentration gradient across

respiration membranes?
A. Ventilation
B. Cartilage
C. Spiracles
D. Cohesion

1 Answer

3 votes
spiracles which is c
answered
User Dlasalle
by
8.7k points
Welcome to Qamnty — a place to ask, share, and grow together. Join our community and get real answers from real people.