Q. ______________ is a communication system composed of glands located throughout thebody that secrete hormones into the blood stream. (Solved)
1. Nervous system
2. Hypothalamus
3. Pituitary gland
4. Endocrine system
- d. Endocrine system
1. Nervous system
2. Hypothalamus
3. Pituitary gland
4. Endocrine system