Gas Exchange in Animals. Respiration All living things carry out respiration.
Respiratory System Chapter 8. Functions of the Respiratory System Breathing process Exchange of Oxygen and Carbon Dioxide Enable speech production.
Lung 肺 O2O2 CO 2 Blood 血 Body cells O2O2 CO 2 A good respiratory surface for gaseous exchange.
Stems and Leaves. Stem internal structure A vascular bundle is a cord of xylem and phloem running through the stem (it’s thesame one that is found in.
