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Showing posts with the label Chapter 14: BREATHING AND EXCHANGE OF GASES NEET NOTES

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ANATOMY OF FLOWERING PLANTS

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  What is Plant Anatomy? Plant anatomy is the study of internal structure and organization of tissues in plants. It helps in understanding: Functional adaptation Transport system Growth patterns Tissue Organization in Flowering Plants Flowering plants have three major tissue systems :  Epidermal Tissue System Components: Epidermis Single layer of compact cells No intercellular spaces Covered by cuticle (except roots) Cuticle Made of cutin Prevents water loss Stomata Present mainly on leaves Composed of guard cells Regulate: Gas exchange Transpiration Root hairs Extensions of epidermal cells Increase surface area for absorption Trichomes (in stem) Hair-like structures Protection + reduce transpiration  Functions: Protection Water conservation Gas exchange 🌿 B. Ground Tissue System  Types of Ground Tissue: 1. Parenchyma Living cells, thin cell wall Large vacuole Functions: Storage Photosynthesis ( chlorenchyma ) Air storage ( aerenchyma ) 2. Collenchyma Living cell...
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Chapter 14: BREATHING AND EXCHANGE OF GASES NEET NOTES

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 Breathing is the process of exchanging oxygen (O2) from the atmosphere with carbon dioxide (CO2) produced by the cells. Oxygen is utilized by organisms to break down simple molecules like glucose, amino acids, and fatty acids to derive energy for various activities. Carbon dioxide, a harmful byproduct of these catabolic reactions, needs to be released from the cells. The respiratory organs are responsible for the exchange of gases during breathing. When we breathe, our chest moves up and down. This movement is a result of the mechanism of breathing. The primary respiratory organs are the lungs, which are located in the chest cavity. Breathing involves two main phases: inhalation and exhalation. During inhalation, the diaphragm and intercostal muscles contract, expanding the chest cavity and creating a vacuum. This leads to the intake of air into the lungs. Oxygen from the inhaled air diffuses into the bloodstream through tiny air sacs called alveoli in the lungs. Carbon dioxide, p...
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