They have to adapt to the water, the animals in the ocean, the way they hear and see.
vaccines are weakened viruses or bacteria that prompt the body to develop antibodies to foght against disease
Liver- a vital organ only found in vertebrates which detoxifies various metabolites, synthesizes proteins and produces biochemicals necessary for digestion and growth. In humans, it is located in the right upper quadrant of the abdomen, below the diaphragm.
