Answer:
there are many..
Explanation:
wheel and axel are two type of forces in simple macine
A complex chemistry is most related to maintaining a stable internal environment.
Answer: As in other higher vertebrates, the frog body may be divided into a head, a short neck, and a trunk (see Vertebrates). The flat head contains the brain, mouth, eyes, ears, and nose. A short, almost rigid neck permits only limited head movement. The stubby trunk forms walls for a single body cavity, the coelom.
Explanation:
Smooth muscles (but depending on the specific type)
