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 tobacco smoking?
- What is activation energy?
- What are antibodies?
- What happens to chest when we inhale?
- How does air enter our lungs?
- Does bronchi and bronchioles process air?