Tissues | Lecture 2 | Chapter 6 | CBSE Class 9 Science | CBSE | Free Education

Tissues | Lecture 2 | Chapter 6 | CBSE Class 9 Science | CBSE | Free Education CBSE Class 9 Science. Let's watch this amazing topic for your effective Board Exam - Science Preparation with proper explanation by your favorite teacher. ✴️✔️ Do 𝐒𝐔𝐁𝐒𝐂𝐑𝐈𝐁𝐄 to the channel for more updates and hit that like button! ❤️ (Turn on your notification 🔔 to get all updates before anyone!!) #tissues #Study #CBSEClass9Science #Class9 #freeeducation #class9preparation Summary of Plant Tissues Introduction In this section, we will explore the classification of plant tissues, focusing on permanent tissues and their types. We have previously discussed meristematic tissues, which are responsible for growth in plants. Permanent Tissues Permanent tissues are formed from meristematic tissues and are specialized for specific functions in plants. They can be classified into two main categories: 1. Simple Permanent Tissues 2. Complex Permanent Tissues Simple Permanent Tissues Simple permanent tissues consist of one type of cell and can be further divided into: Parenchyma Collenchyma Sclerenchyma Parenchyma *Structure*: Parenchyma cells are oval and elongated, loosely packed with large intercellular spaces. *Function*: Provides basic packing for the plant. Stores food and nutrients in vacuoles. In some cases, contains chlorophyll for photosynthesis (called chlorenchyma). In aquatic plants, parenchyma cells have large air cavities to help them float (called aerenchyma). Collenchyma *Structure*: Collenchyma cells are elongated and tightly packed, with thickened cell walls at the corners. *Function*: Provides mechanical support and flexibility to young stems and leaves, allowing them to bend without breaking. Sclerenchyma *Structure*: Sclerenchyma cells are narrow and elongated, with thick, lignified cell walls. *Function*: Provides strength and support to the plant, particularly in hard parts like seeds and nuts. Complex Permanent Tissues Complex permanent tissues consist of different types of cells working together to perform a common function. The two main types are: *Xylem*: Responsible for the transport of water and minerals from roots to other parts of the plant. *Phloem*: Responsible for the transport of food (sugars) produced during photosynthesis from leaves to other parts of the plant. Epidermis The epidermis is a protective layer covering the entire plant body, including leaves, stems, and roots. *Structure*: Composed of tightly packed cells, often with a waxy cuticle to prevent water loss. *Function*: Protects the plant from injury, pathogens, and water loss. Contains stomata for gas exchange, which can open and close to regulate water loss and gas exchange. Stomata Stomata are small openings on the epidermis that allow for gas exchange. *Structure*: Composed of guard cells that can change shape to open or close the stomata. *Function*: Facilitate the exchange of gases (oxygen and carbon dioxide) with the atmosphere. Control water loss through transpiration. Conclusion Plant tissues are essential for various functions, including growth, support, and protection. Understanding the different types of tissues and their roles helps us comprehend how plants function as living organisms. The study of plant tissues lays the foundation for further exploration of plant biology and physiology. 🔔 SUBSCRIBE and GET it FREE:    / @free-educations