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Double Circulation of Blood - Transport in Plants Animals, Science, Class 7 Video Lecture

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1. What is double circulation of blood in plants and animals?

Double circulation of blood refers to the process in which blood is pumped twice through the heart for each complete cycle of circulation. In this process, deoxygenated blood from the body is first pumped to the lungs or gills to get oxygenated, and then it returns to the heart. From the heart, the oxygenated blood is pumped to different parts of the body for supplying oxygen and nutrients. This double circulation ensures efficient oxygenation of blood and proper distribution of nutrients to all body parts.

2. How does double circulation of blood occur in plants?

Double circulation of blood does not occur in plants. Plants do not have a circulatory system like animals. Instead, they have a vascular system that transports water, minerals, and nutrients throughout the plant. This system consists of xylem and phloem, which are responsible for the transport of water and nutrients respectively. Xylem transports water and minerals from roots to leaves, while phloem transports sugars and other organic compounds from leaves to other parts of the plant.

3. What are the advantages of double circulation of blood in animals?

Double circulation of blood in animals provides several advantages. Firstly, it ensures efficient oxygenation of blood by pumping it to the lungs or gills for oxygenation before distributing it to the body. This allows animals to extract a higher amount of oxygen from the environment. Secondly, double circulation helps maintain a higher blood pressure in the systemic circulation, which ensures the proper distribution of oxygen and nutrients to all body tissues. It also enables animals to regulate their body temperature more effectively.

4. How is double circulation of blood different from single circulation?

Double circulation of blood involves two separate circuits for blood flow, while single circulation involves only one circuit. In double circulation, deoxygenated blood from the body is pumped to the lungs or gills for oxygenation in the pulmonary or respiratory circuit. The oxygenated blood then returns to the heart and is pumped to the rest of the body in the systemic circuit. In single circulation, blood is pumped from the heart to the gills or lungs for oxygenation, and then it is directly pumped to the body tissues. This means that blood passes through the heart only once in a single circulation system.

5. Which animals have double circulation of blood?

Double circulation of blood is present in mammals, birds, and reptiles. These animals have a four-chambered heart, which allows for the separation of oxygenated and deoxygenated blood. In mammals, birds, and reptiles, the blood is pumped to the lungs or respiratory organs for oxygenation and then returned to the heart for distribution to the rest of the body. This type of circulation allows these animals to have a high metabolic rate and maintain a constant body temperature.

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Nov 24, 2024 Last updated

Double Circulation of Blood - Transport in Plants Animals, Science, Class 7 for Class 72024 is part of Class 7 preparation. The notes and questions for Double Circulation of Blood - Transport in Plants Animals, Science, Class 7 have been prepared according to the Class 7 exam syllabus. Information about Double Circulation of Blood - Transport in Plants Animals, Science, Class 7 covers all important topics for Class 72024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Double Circulation of Blood - Transport in Plants Animals, Science, Class 7.

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