What are the four primary fontanelles on the fetal skill?

Major fontanels of the fetal skull

Anterolateral fontanel. (Sphenoidal)

Posterolateral fontanel. (Mastoid)

Anterior fontanel. (Frontal)

Posterior fontanel. (Occipital)

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.