4. What body systems are described in the concept map below?
Gland
secretes
Hormone
Transported
by blood
Body responds and
changes
A. Circulatory and excretory
B. Endocrine and circulatory
C. Excretory and endocrine
D. Respiratory and excretory
Energy stored in the bonds that hold together the atoms and molecules of all substances is called a. kinetic energy. b. electrical energy. c. mechanical energy. d. chemical energy.