Blood
1. Blood is a fluid that circulates through the body, delivering oxygen and nutrients.
2. It is made up of red blood cells, white blood cells, platelets, and plasma.
3. Red blood cells carry oxygen from the lungs to the body.
4. White blood cells help fight infections and diseases.
5. Platelets help in clotting to stop bleeding.
6. Plasma is the liquid part of blood and carries hormones, nutrients, and waste.
7. Blood is pumped by the heart through arteries and veins.
8. There are four main blood types: A, B, AB, and O.
9. Blood is essential for maintaining body temperature and pH balance.
10. Losing too much blood can be dangerous and may require a transfusion.
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1. How does blood clot when you get a cut?
Platelets stick to the cut and form a plug, while proteins in plasma create a clot to stop bleeding.
2. Why do people have different blood types?
Blood types are based on specific proteins (antigens) on red blood cells inherited from your parents.
3. What happens if someone gets the wrong blood type in a transfusion?
The immune system attacks the foreign blood cells, which can cause serious or even deadly reactions.
4. Why do veins look blue when blood is actually red?
Veins look blue through skin because of how light is absorbed and reflected, even though the blood is dark red.
5. How does blood transport oxygen throughout the body?
Red blood cells carry oxygen using a protein called hemoglobin, delivering it to tissues all over the body.
6. What are some common blood disorders?
Common blood disorders include anemia, leukemia, hemophilia, and sickle cell disease.