Circulatory System
ICSE · Class 5 · Science
Flashcards for Circulatory System — ICSE Class 5 Science. Quick Q&A cards covering key concepts, definitions, and formulas.
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What is the circulatory system?
Answer
The circulatory system is the body's transportation system that moves blood throughout the body. It carries oxygen, nutrients, and waste products to and from cells.
Name the three main parts of the circulatory system.
Answer
The three main parts are: 1. Heart, 2. Blood, and 3. Blood vessels (arteries, veins, capillaries).
What is the function of the heart?
Answer
The heart pumps blood to all parts of the body. It pushes oxygen-rich blood to body cells and receives oxygen-poor blood back for purification.
How many chambers does the human heart have?
Answer
The human heart has four chambers: two upper chambers called atria (left and right), and two lower chambers called ventricles (left and right).
Which chamber of the heart receives oxygen-rich blood from the lungs?
Answer
The left atrium receives oxygen-rich blood from the lungs through the pulmonary vein.
Which chamber pumps oxygen-rich blood to the entire body?
Answer
The left ventricle pumps oxygen-rich blood to the entire body through the aorta, the largest artery.
Why is the wall of the left ventricle thicker than other chambers?
Answer
The left ventricle pumps blood to the entire body, so it needs strong muscles. Its thick wall helps it push blood with high pressure.
What is blood made of?
Answer
Blood is made of four main parts: 1. Red blood cells (carry oxygen), 2. White blood cells (fight germs), 3. Platelets (help in clotting), and 4. Plasma (yellow liquid that carries everything).
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