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 many parts does flower has?
- How are fats digested?
- What is chlorophyll?
- How does large trees take up water?
- How does tar damage lungs?
- What is pollination?