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ICSE Class X Notes 2025 : Biology (City Montessori School (CMS), Vardhan Khand, Gomtinagar Campus 2, Lucknow)

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Page 2 Page 3 1. Stoma minute openings in the upper epidermal layer of leaves, surrounded by two bean shaped guard cells 8. coronary artery supplies blood to the heart muscles, arising from the base of the aorta. 2. chloroplast located in the periphery of the mesophyll cells of leaves, in the cytoplasm. 9. Right AV valve located in the aperture between the right atrium and right ventricle. 3. Heart located in the centre between the two lungs, above the diaphragm. 10.Left AV valve located in the aperture between the left atrium and the left ventricle. 4. Anterior vena cava carries deoxygenated blood from the upper parts of the body into the right atrium. 11.semilunar valve located between the right ventricle and the pulmonary artery and between the left ventricle and the aorta 5. posterior vena cava carries deoxygenated blood from the lower parts of the body into the right atrium. 12.SAN Located in the walls of the right atrium. 6. pulmonary artery carries deoxygenated blood from the right ventricle to the lungs. 13.AVN located in the inter-auricular septum near the tricuspid valve. 7. aorta carries oxygenated blood from the left ventricle to the body. 14.bundle of His arises from the AVN and extends down the interventricular septum

 

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