The topics covered in Class 9 Science Chapter 6 Tissue PDF Notes typically include:
- Introduction to tissues and their types: The Class 9 Science Chapter 6 Tissue begins with an introduction to the concept of tissue, its importance and the different types of tissues found in plants and animals.
- Plant Tissues: The chapter covers the three types of plant tissues: dermal, ground, and vascular. It explains the structure and function of each type of tissue and how they work together to support the plant’s growth and survival.
- Animal Tissues: The chapter also covers the four types of animal tissues: epithelial, connective, muscle, and nervous. It explains the structure and function of each type of tissue and their role in maintaining the integrity of the animal body.
- Tissue repair and regeneration: This section discusses the process of tissue repair and regeneration in animals and plants. It covers the mechanisms by which cells divide and differentiate to form new tissues.
- Tissue organization in animals: The chapter explains the organization of tissues in animals, from simple to complex, like Epithelial tissue, Connective tissue,Muscular tissue, Nervous tissue.
- Conclusion: This chapter of Class 9 Science TISSUE concludes with a summary of the key concepts covered in the chapter and their importance in the functioning of plants and animals.
The PDF Notes of the Chapter 6 of class 9 Science “Tissue” is given above. These PDF Notes helps the student to understand the different types of Tissues of Plants and Animals. The plant tissue and Animal tissues both have the different works in the plant body as well as in Animal body. This chapter helps to understand the Tissues and Working of Plant tissues.
Plant Tissue
Plant tissues are groups of cells that perform specific functions in a plant. They are organized into different types based on their structure, function, and location in the plant. Plant Tissues are further divided into two main parts :- Meristematic Tissues and Permanent Tissues.
Meristematic Tissues
Meristematic tissue is a type of plant tissue that is responsible for growth and cell division. It is composed of actively dividing cells that are capable of differentiating into other types of plant tissues. There are three types of meristematic tissue in plants:
Apical meristems: These are located at the tips of roots and shoots and are responsible for the elongation of the plant. They give rise to new cells that differentiate into the various tissues of the root or shoot.
Lateral meristems: These are located along the lateral sides of the plant and are responsible for increasing the diameter of the plant. They give rise to new cells that differentiate into secondary xylem and phloem.
Intercalary meristems: These are located at the base of leaves and some stem, and are responsible for the growth of plants in length. They give rise to new cells that differentiate into the various tissues of the stem or leaf.
These meristematic tissues are found in different parts of the plant and are responsible for the plant growth and development.
Permanent Tissues
Permanent tissue is a type of plant tissue that is formed from cells that have stopped dividing and have taken on a specific function. There are two main types of permanent tissue in plants:
Simple permanent tissue: This type of tissue is composed of similar cells that perform the same function. Examples of simple permanent tissue include parenchyma, collenchyma, and sclerenchyma.
Complex permanent tissue: This type of tissue is composed of different types of cells that perform different functions. Examples of complex permanent tissue include xylem and phloem.
Parenchyma: Parenchyma is the most common type of simple permanent tissue. Its cells are generally isodiametric, thin-walled and have a large central vacuole. It is found in the mesophyll of leaves, cortex of stem and root, and in the pulp of fruits.
Collenchyma: Collenchyma tissue is composed of elongated cells with thick walls. It provides structural support to the plant, especially in young and expanding regions such as stems and leaves.
Sclerenchyma: Sclerenchyma tissue is composed of cells with thick and lignified walls. It provides mechanical support to the plant and is found in the stem and other parts of the plant.
Xylem: Xylem is the complex permanent tissue responsible for the transport of water and minerals from the roots to the rest of the plant. It is composed of several types of cells including tracheids, vessels, and xylem fibers.
Phloem: Phloem is the complex permanent tissue responsible for the transport of sugars and other organic compounds throughout the plant. It is composed of several types of cells including sieve-tube elements, companion cells, and phloem fibers.
Animal Tissue
Animal tissues are groups of cells that perform specific functions in an animal’s body. These Tissues are categorised into different types based on their structure, function, and location in the animal’s body. Four main types of animal tissues are : epithelial, connective, muscle, and nervous.
Epithelial tissue: Epithelial tissue lines the surfaces of the body and forms glands. It provides a barrier between the body and the environment, and also helps in the absorption, secretion and excretion.
Connective tissue: Connective tissue provides support, protection and holds organs in place. It includes various types like loose, dense and special connective tissue like cartilage, bone, and blood.
Muscle tissue: Muscle tissue is responsible for movement. It is of three types: skeletal, smooth and cardiac. Skeletal muscle is attached to bones. It is responsible for voluntary movement and cardiac muscle is found in the heart and is responsible for pumping blood.
Nervous tissue: Nervous tissue is responsible for sensing and responding to stimuli. These Tissues are composed of neurons and supporting cells called glial cells. It forms the brain, spinal cord, and nerves.
Additionally, students will also learn about the importance of tissues in the growth and development of animals, the process of tissue repair, and how different tissues work together to support the overall functioning of the animal body
After reading this Chapter you can through the next chapter of the class 9 Science Chapter – 7 Diversity in Living Organisms