Th RECTUM is placed at the lower end of the large intestine.
The theory of tectonic plates explains that large convectional currents occuring in the mantle(as a result of magma) are the reasons plates,and so continents,are moved. Note movement occurs in the boundary in between the plates.
Cellular respiration is the process by which organisms use oxygen to break down food molecules to get *chemical energy *for cell functions.
