The red blood cells (RBCs) in your body have an important job and go through an interesting life cycle. Here’s what happens from start to finish:
1. Birth: Red blood cells are made inside your bones in a special place called bone marrow. Your body makes millions of them every second! These new RBCs are round and flexible, which helps them move through your blood vessels.
2. Life: Once they leave the bone marrow, RBCs travel all around your body through your blood. Their main job is to carry oxygen from your lungs to all the different parts of your body. They also bring back carbon dioxide (a waste gas) from your body to your lungs so you can breathe it out. RBCs are like tiny delivery trucks, bringing oxygen to where it’s needed and picking up waste.
3. Work: RBCs are busy and work hard for about 120 days (that’s about four months). They keep moving and delivering oxygen to keep your body healthy and full of energy.
4. End: After about 120 days, RBCs start to get old and worn out. Your body knows when it’s time to recycle them. These old RBCs go to the spleen and liver, where they are broken down. The useful parts of the old cells are saved and used to make new RBCs.
So, the life of a red blood cell is like a never-ending cycle: new RBCs are born in the bone marrow, they travel around your body delivering oxygen, and after about 120 days, they are recycled to make room for new RBCs. This cycle keeps your body running smoothly and full of energy!
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