The Chordata Phylum comprises triblastic, hairy and deuterostomy individuals. They have closed circulation, complete digestive tract; single, dorsal and hollow nervous tube and pharyngeal slits. They may present bilateral symmetry, skull and endoskeleton. As an example of members of this phylum, we can mention Birds, Reptila, Osteichythyes and Amphiba.
Cephalopods belong to the Mollusca phylum they are animals that have feet (can) on the head (cephalus). Octopus and squid are part of this class (Cephalopoda) of mollusks. All animals in this class are marine predators.
In homeostasis the body has a target set point which it tries to maintain, with the use of the negative feedback loop the body strives to stabilize the internal environment by regulating the temperature of the body.
