Answer the following questions
How many types of blood corpuscles are there? Write their functions.
Types of Blood Corpuscles and Their Functions:
Red Blood Corpuscles (RBCs): Function: RBCs, or erythrocytes, contain hemoglobin, which binds with oxygen in the lungs and transports it to various tissues and organs. They also help in the transport of carbon dioxide back to the lungs for exhalation.
b. White Blood Corpuscles (WBCs): Function: WBCs, or leukocytes, play a crucial role in the immune system. They defend the body against infections, bacteria, viruses, and other foreign substances. WBCs are involved in the process of phagocytosis and the production of antibodies.
c. Platelets: Function: Platelets are involved in blood clotting. When there is an injury, platelets adhere to the damaged area, forming a clot to prevent excessive bleeding.
What do you mean by open and closed blood circulation?
In an open circulatory system, the blood directly comes in contact with body tissues and organs. The blood is not always enclosed in vessels. Examples: Insects and some mollusks.
In a closed circulatory system, the blood is enclosed in vessels (arteries, veins, and capillaries) and does not directly contact body tissues. Examples: Humans and other vertebrates.
What do you mean by blood donation?
Blood donation refers to the voluntary act of giving a portion of one’s blood, typically through a blood donation process. The collected blood is used for various medical purposes, including surgeries, treatments, and emergency situations.
What are the differences between veins and arteries ?
What do you understand by pulse rate?
Pulse rate is the number of times the heart beats per minute, typically measured by palpating an artery, often the radial artery in the wrist. It serves as an indicator of heart rate and cardiovascular health. A resting person usually has a pulse rate between 60 and 100 beats per minute.
What is the role of lungs in the blood circulatory system?
Lungs play a important role in the blood circulatory system by exchange of gases. Oxygenated blood from the lungs is transported to the heart, where it is then pumped to various parts of the body. Simultaneously, deoxygenated blood, rich in carbon dioxide, returns from the body to the lungs. In the lungs, carbon dioxide is expelled, and the blood is oxygenated again, ensuring a continuous supply of oxygen to the body.
What will happen if the capacity of the cardiac muscles to contract and relax gets weakened?
If the capacity of the cardiac muscles to contract and relax gets weakened, the pumping efficiency of the heart decreases. This can lead to insufficient blood circulation, resulting in reduced oxygen supply to body tissues and organs. It may cause fatigue, shortness of breath, and, in severe cases, organ damage due to inadequate oxygen and nutrient delivery.
