juxtaglomerular cells to release renin

adrenal cortex to release aldosterone

adrenal medulla to release adrenaline

posterior pituitary to release vasopressin.

Gall blader

Kidney

Spleen

Liver

has very high amounts of suspended solids and dissolved salts

has a high BOD as it contains both aerobic and anaerobic bacteria.

is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plant (STPs)

When treated in STPs does not really require the aeration step as the sewage contains adequate oxygen

Zeatin

Ethylene

ABA

IAA