If you are the student of class 8 and looking to study the blood vascular system in detail. J K Online classes bring you the chapter on topic blood vascular system along with important points, question-answers & many more.
In this chapter, we will explore the fascinating world of the blood vascular system, a crucial part of our body that helps in the transportation of essential substances and ensures our well-being.
Chapter Overview: 1. Introduction - Definition of the Blood Vascular System, Components: Blood, Blood Vessels, and Heart 2. Blood - Definition and Composition, Functions of Plasma, RBCs, WBCs, and Platelets, Importance of Blood in the Body 3. Blood Vessels - Types of Blood Vessels: Arteries, Veins, and Capillaries, Functions of Blood Vessels, Importance of Healthy Blood Vessels 4. The Heart - Structure and Function of the Heart, Circulatory Pathway: Pulmonary Circulation and Systemic Circulation, Importance of a Healthy Heart
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| Blood Circulation System (J K Online Classes) |
1. Introduction
The blood vascular system is a network of blood vessels and the heart that circulates blood throughout the body. It consists of arteries, veins, capillaries, and the heart. The system plays a crucial role in transporting oxygen, nutrients, hormones, and waste products to and from the cells of the body.
2. Blood
Blood is a specialized fluid connective tissue that consists of plasma and formed elements. Plasma is the liquid component of blood, while the formed elements include red blood cells (RBCs), white blood cells (WBCs), and platelets. RBCs transport oxygen to tissues, WBCs defend the body against pathogens, and platelets help in blood clotting.
3. Blood Vessels
Arteries carry oxygen-rich blood away from the heart to various parts of the body. Veins carry oxygen-poor blood back to the heart. Capillaries are tiny blood vessels that connect arteries and veins, allowing for the exchange of gases, nutrients, and waste products between blood and tissues.
4. The Heart
The heart is a muscular organ that pumps blood throughout the body. It consists of four chambers: two atria and two ventricles. The right side of the heart pumps blood to the lungs for oxygenation, while the left side pumps oxygenated blood to the rest of the body.
- Circulatory Pathway
Blood circulates through two pathways: pulmonary circulation and systemic circulation. Pulmonary circulation carries blood between the heart and lungs for oxygenation, while systemic circulation carries oxygenated blood to the body and de-oxygenated blood back to the heart.
- Importance of a Healthy Blood Vascular System
A healthy blood vascular system is essential for overall health and well-being. It ensures the efficient transport of oxygen, nutrients, and other vital substances to cells and helps remove waste products from the body. Maintaining a healthy lifestyle, including regular exercise and a balanced diet, can help keep the blood vascular system functioning properly.
Summary
The blood vascular system is a complex network of blood vessels and the heart that circulates blood throughout the body. It consists of arteries, veins, capillaries, and the heart. Blood carries oxygen, nutrients, hormones, and waste products to and from cells. Arteries carry oxygen-rich blood away from the heart, veins carry oxygen-poor blood back to the heart, and capillaries allow for the exchange of substances between blood and tissues. The heart pumps blood through the circulatory system, ensuring the continuous flow of blood. Maintaining a healthy blood vascular system is essential for overall health and well-being.
Important Points
- The blood vascular system comprises blood, blood vessels, and the heart.
- Blood is a liquid connective tissue consisting of plasma and blood cells (RBCs, WBCs, and platelets).
- RBCs transport oxygen, WBCs help fight infections, and platelets aid in blood clotting.
- Blood vessels include arteries, veins, and capillaries, each with specific functions in circulation.
- The heart pumps blood through the circulatory system, ensuring the continuous flow of blood.
Uses of blood
- Blood helps in transportation of oxygen and carbon dioxide to body.
- Blood helps in transport of nutrients and hormones to different parts of body and removal of urea, uric acid and salts through excretory system.
- It helps in regulating the temperature of the body
- It also maintains the water balance of the body as well.
Hard Words from Chapter
1. Vascular - relating to blood vessels.
2. Plasma - the liquid component of blood.
3. Corpuscles - blood cells.
4. Engulfing - surrounding and absorbing something completely.
5. Pathogens - microorganisms that cause disease.
Questions and Answers
1. What is the blood vascular system?
2. What are the three main components of the blood vascular system?
3. Describe the functions of RBCs, WBCs, and platelets.
4. How do arteries, veins, and capillaries differ in structure and function?
5. Explain the circulatory pathway of blood in the body.
6. Why is it important to maintain a healthy blood vascular system?
7. Describe the composition of blood.
8. How does the heart pump blood through the circulatory system?
Fill in the Blanks
1. Blood is a ________ connective tissue.
2. Red Blood Corpuscles transport ________ to the body tissues.
3. White Blood Corpuscles help in fighting against ________.
4. Platelets help in the ________ of blood.
5. Arteries carry blood ________ from the heart.
3. The heart consists of ________ chambers.
4. Capillaries allow for the exchange of substances between blood and ________.
5. Pulmonary circulation carries blood between the heart and ________.
Match the Following
1. Plasma - Liquid component of blood.
2. Capillaries - Smallest blood vessels.
3. Pulmonary Circulation - Circulation between heart and lungs.
4. Platelets - Responsible for blood clotting.
5. Arteries - Carry blood away from the heart.
Multiple Choice Questions
1. Which of the following is not a component of the blood vascular system?
A) Bones
B) Blood vessels
C) Heart
D) Blood
2. What is the function of White Blood Corpuscles?
A) Transport oxygen
B) Fight infections
C) Aid in blood clotting
D) None of the above
3. Which blood vessels carry blood back to the heart?
A) Arteries
B) Veins
C) Capillaries
D) All of the above
4. The circulatory pathway from the heart to the lungs and back is known as:
A) Pulmonary circulation
B) Systemic circulation
C) Cardiac circulation
D) Coronary circulation
5. What is the main function of platelets?
A) Transport nutrients
B) Fight infections
C) Aid in blood clotting
D) Carry oxygen
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