Red blood cells are shaped like smooth discs that allow them to flow easily through arteries and veins. what does this illustrate?
question 1 options:
a)
homeostasis
b)
structure and function relationship
c)
chemosynthesis

B) Structure and function relationship

Red blood cells are round, with a flat indented center without a hole. It carries oxygen and remove carbon dioxide from the body.

Red blood cells are disc shaped because they have more membrane than needed to hold the volume, so it is like a balloon that is flattened. This makes them more flexible and allow them to squeeze more easily through the capillaries. Therefore, it shows structural and functional relationship.

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.