Topic: Body Transport System Subtopic: What is blood?
Where are red blood cells made?
Answer: When old ones die, new red blood cells are produced in the bone marrow, which fills the center of the large bones like shin bone.
- What is aerobic respiration?
- What is heart transplant?
- What are first symptoms of flu?
- How is flu treated?
- What is an artificial pacemaker?
- What are intercoastal muscles?