Welcome. 1  Welcome to the Internet home of Park County School District 6. Together, the eight schools that comprise our district provide a safe, empowering learning environment for kindergarten through twelfth grade students in Cody, Wyoming.
Insulation. Styrofoam insulates much more effectively than plastic, which means your cold drinks stay colder longer and your hot drinks stay hotter. Plastic cups are not recommended for hot drinks, and they do not have the insulation properties of Styrofoam.
Summary: Vessels have perforations at the end plates while tracheids do not have end plates. Tracheids are derived from single individual cells while vessels are derived from a pile of cells. Tracheids are present in all vascular plants whereas vessels are confined to angiosperms.Tracheids are thin whereas vessel elements are wide. Tracheids have a much higher surface-to-volume ratio as compared to vessel elements.Vessels are broader than tracheids with which they are associated.Morphology of the perforation plate is different from that in tracheids.racheids are thin whereas vessel elements are wide. Tracheids have a much higher surface-to-volume ratio as compared to vessel elements. Vessels are broader than tracheids with which they are associated. Morphology of the perforation plate is different from that in tracheids.