Download to read offline
Class 10 chapter 6 life process Transportation_in_Human_Beings.pptx
- 1. Class 10 Science– Life Processes Transportation in Human Beings (Circulatory System)
- 2. Why Do WeNeed Transportation? • Our body is like a mega city with trillions of citizens (cells), and just one delivery system – the circulatory system. • Transportation means the movement of essential substances like oxygen, food, hormones, and waste from one part of the body to another.
- 3. The Circulatory System– A Super Delivery Network • Three key parts: • 1. Heart – The pumping station • 2. Blood – The transport fluid • 3. Blood Vessels – The roads and highways
- 5. The Heart –Engine of the Body • Four Chambers: • - Right Atrium & Ventricle: Deoxygenated blood • - Left Atrium & Ventricle: Oxygenated blood • Why 4 chambers? • To separate oxygen-rich and oxygen-poor blood.
- 6. Double Circulation –The Twin Journey • Pulmonary Circulation: Heart → Lungs → Heart • Systemic Circulation: Heart → Body → Heart • Blood goes through the heart twice in one cycle – ensures efficiency.
- 7. Blood – TheLiving Transport Fluid • RBCs – Carry oxygen • WBCs – Fight infections • Platelets – Help in clotting • Plasma – Transports nutrients, hormones, waste
- 8. Blood Vessels –The Highways • Arteries – Thick walls, carry blood away • Veins – Thin walls, carry blood to heart, valves present • Capillaries – One-cell thick, exchange of materials
- 9. The Lymphatic System– The Silent Helper • Lymph: • - Carries digested fat • - Returns leaked fluid • - Transports WBCs • Acts as a backup circulation system
- 10. Quick Summary • HeartPumps – Blood Delivers – Cells Live
- 11. Extra Exam Notes •- Valves are only in veins (prevent backflow) • - Left ventricle is thicker (pumps to whole body) • - Blood flow is unidirectional due to valves & pressure
- 13. More on DoubleCirculation • Double circulation ensures complete separation of oxygenated and deoxygenated blood. • This improves oxygen supply to tissues and supports higher metabolic activity — a necessity for warm-blooded animals like humans.
- 14. Flow of Blood(Step-by-step) • 1. Deoxygenated blood from the body → Right Atrium • 2. Right Atrium → Right Ventricle • 3. Right Ventricle → Lungs (via Pulmonary Artery) • 4. Oxygenated blood from lungs → Left Atrium • 5. Left Atrium → Left Ventricle • 6. Left Ventricle → Whole Body (via Aorta)
- 15. Functions of theCirculatory System • - Transport of oxygen and nutrients to tissues • - Removal of carbon dioxide and wastes • - Regulation of body temperature • - Defense against infections via WBCs • - Distribution of hormones
- 16. Heartbeat and Pulse •Heartbeat is one complete contraction and relaxation of the heart muscles. • Pulse is the rhythmic throbbing of arteries due to the beating heart. • Normal rate: 70–72 beats per minute in a healthy adult.
- 17. Disorders of CirculatorySystem • 1. Hypertension (High BP): Can damage arteries • 2. Heart Attack: Blockage in coronary artery • 3. Anemia: Low hemoglobin → less oxygen • 4. Varicose veins: Faulty valves in veins • 5. Leukemia: Cancer of WBCs