Class 7 Exam > Class 7 Videos > Learning:Blood and its Components
Learning:Blood and its Components Video Lecture - Class 7
FAQs on Learning:Blood and its Components Video Lecture - Class 7
| 1. What is blood made up of? |  |
Ans. Blood is made up of several components, including red blood cells, white blood cells, platelets, and plasma.
| 2. What is the function of red blood cells in the blood? | |
Ans. Red blood cells, also known as erythrocytes, are responsible for carrying oxygen from the lungs to all the cells in the body. They contain a protein called hemoglobin that binds to oxygen and transports it to different tissues and organs.
| 3. What are the different types of white blood cells found in the blood? | |
Ans. There are several types of white blood cells, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils. Each type plays a specific role in the immune system, such as fighting infections, producing antibodies, or regulating inflammatory responses.
| 4. What is the role of platelets in the blood? | |
Ans. Platelets, also called thrombocytes, are responsible for blood clotting. When a blood vessel is damaged, platelets form a plug to stop bleeding. They release clotting factors and help in the formation of a fibrin mesh that seals the wound.
| 5. What is plasma and what does it contain? | |
Ans. Plasma is the liquid component of blood that makes up about 55% of its volume. It is mostly composed of water, but it also contains various proteins, hormones, electrolytes, waste products, and nutrients. Plasma helps transport these substances throughout the body and plays a crucial role in maintaining the body's fluid balance.
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