Histology is the study of tissues. There are only four primary tissue types: epithelial, connective, muscular and neural. For now we will only concentrate on epithelial and connective tissues. Epithelial tissue covers exposed surfaces or lines internal cavities or passageways and forms glands.
The Cathedral of Learning in Bangkokâs Assumption University soars to a towering 522 feet (159 meters) in height. Built in 2002, the 39-story structure mimics the design of the University of Pittsburghâs Cathedral of Learning â albeit in a more postmodern style.
The intricate nature of the nation's cathedrals means they are as jaw-droppingly beautiful now as when they were first built. So, as Salisbury Cathedral celebrates its 750th birthday, we pick out some other show-stoppers worthy of a visit. Its spectacular spire is the tallest medieval structure in Britain.