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.
- How long it takes to recover from heart transplant?
- Where does bacteria in faeces come from?
- What are proteins and functions?
- What is role of immune system in heart transplant?
- Why is heart useful?
- Where does respiration take place?