Compare and contrast the endocrine system and the nervous system

1. Compare and contrast the endocrine system and the nervous system, including the main differences in the communication methods used by these systems. 

Why are they sometimes collectively referred to as the endoneurosystem?

1. Discuss the structure and function of red blood cells and hemoglobin and describe the various steps in the lifecycle of an erythrocyte.
2. Following a motor vehicle accident, a patient is rushed to the emergency department with multiple traumatic injuries, causing severe bleeding. The patient’s condition is critical, and there is no time for determining his blood type.  What type of blood is transfused, and why? 
3. Describe the flow of lymph from its origins in interstitial fluid to its emptying into the venous bloodstream.
4. Identify the primary functions of blood in transportation, defense, and maintenance of homeostasis.