What is Blood Made Of? (Parts of Blood)
Blood is made up of four main components:
1. Plasma (55% of blood volume)
- The liquid, straw-colored portion of blood — mostly water (about 90%)
- Carries proteins, hormones, nutrients, and waste products
- Contains clotting factors that help stop bleeding
2. Red Blood Cells (RBCs) / Erythrocytes
- Carry oxygen from the lungs to the rest of the body using hemoglobin
- Give blood its red color
- Made in the bone marrow; live for about 120 days
3. White Blood Cells (WBCs) / Leukocytes
- The body's defense system against infections and diseases
- Types include neutrophils, lymphocytes, monocytes, eosinophils, and basophils
- Increase in number when the body is fighting an infection
4. Platelets (Thrombocytes)
- Small cell fragments responsible for blood clotting
- Prevent excessive bleeding when a blood vessel is injured
Common Blood-Related Diseases
| Disease Description | |
| Anemia | Low red blood cell count or hemoglobin, causing fatigue and weakness |
| Leukemia | Cancer of blood-forming tissues, leading to abnormal white blood cell growth |
| Hemophilia | A genetic disorder where blood doesn't clot properly |
| Thalassemia | An inherited disorder causing abnormal hemoglobin production |
| Diabetes (High Blood Sugar) | Excess glucose in the blood, damaging organs over time |
| Hypertension | High blood pressure that can damage blood vessels and the heart |
| Blood Clots (Thrombosis) | Abnormal clot formation that can block blood flow |
| Sepsis | A dangerous blood infection that spreads throughout the body |
Benefits of Healthy Blood & Regular Monitoring
- Oxygen Delivery – Keeps organs and muscles functioning properly
- Immunity – Fights infections and heals wounds
- Nutrient Transport – Delivers glucose, vitamins, and minerals to cells
- Temperature Regulation – Helps maintain stable body temperature
- Waste Removal – Clears carbon dioxide and toxins via kidneys and lungs
- Early Disease Detection – Routine blood tests can catch issues like diabetes, anemia, or infections before symptoms worsen
Conclusion
Blood is the foundation of a healthy body — carrying oxygen, fighting disease, and keeping every system running smoothly. Since many blood-related conditions (like anemia, diabetes, or high blood pressure) show early warning signs only through testing, regular monitoring is key to catching problems early.
This is where a health-tracking app like Sehatapp can play a valuable role — by helping users log vital signs, track health metrics over time, set reminders for check-ups, and stay informed about their overall wellness. Pairing awareness of how blood works with consistent digital health tracking empowers people to take a proactive approach to their well-being.