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.
Learn also:
- What is semi-permaeable membrane?
- What is circulatory system?
- How are xylem and phloem arranged in stem?
- What are properties of vessels?
- What is osmosis?
- Why is cross pollination better?