Fact 1: Cartilage is a tough tissue that contains a protein called collagen.

Fact 2: Membranes attached to the cricoid cartilage .

Given the two facts above, answer the question "What does cricoid contain?" with the following options: 
- Bodily water
 - cellulum
 - cellulite
 - Energy
 - hydrocarbons
 - cellulose
 - cellular
 - layers of fat


 

      cellulose   