One type of density change is mass over volume.
Well-sorted sediments have grains of similar size, and are the result of much sediment transport and earth processes which segregated the sediment by depositing different size fractions in different places.
Superior vena cava- upper body inferior vena cava
lower body- bother drain into the right atrium
The cells are producing carbon dioxide and water. By taking in oxygen, the one performing cellular respiration releases carbon dioxide into the air.
