Match the following terms and definitions.
1. tiny sacs within the lungs which increase the surface available for gas exchange
amylase
2. a digestive enzyme that breaks down starches and glycogen into sugars
bronchi
3. the two thin-walled chambers that receive blood into the heart from the veins
atria
4. the two tubes into which the trachea divide to go into each lung
alveoli
5. a tiny vessel through which diffusion takes place between the blood and the body tissues
capillary
6. a mass of nerve tissue not part of the brain
ganglia