NCERT Book page 123, class 7 (Transport system)
Arteries carry Oxygenated (full of Oxygen) blood to all parts of the body and Veins carry de-oxygenated blood (blood with Carbon Dioxide) to all parts of body BUT with exceptions of Pulmonary Artery and Pulmonary Vein. PULMONARY ARTERY carries blood from the heart to lungs but this blood carries Carbon Dioxide which is taken to lungs for releasing it into the atmosphere through them. Blood then returns from lungs with oxygen through PULMONARY VEIN which in this case carries blood full of Oxygen.
Arteries and Veins are joined together through Capillaries which are extremely small. Do you know that the extensive network of capillaries in an average human body is about 100000 Kms?
Arteries carry Oxygenated (full of Oxygen) blood to all parts of the body and Veins carry de-oxygenated blood (blood with Carbon Dioxide) to all parts of body BUT with exceptions of Pulmonary Artery and Pulmonary Vein. PULMONARY ARTERY carries blood from the heart to lungs but this blood carries Carbon Dioxide which is taken to lungs for releasing it into the atmosphere through them. Blood then returns from lungs with oxygen through PULMONARY VEIN which in this case carries blood full of Oxygen.
Arteries and Veins are joined together through Capillaries which are extremely small. Do you know that the extensive network of capillaries in an average human body is about 100000 Kms?
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