Class 9 Science - WEST-BENGAL
Tissues in Action
The chapter Tissues in Action in Class 9 Science under the West Bengal Board (WBBSE) explores how groups of similar cells join together to perform specific functions in plants and animals. Students will learn about plant tissues like meristematic and permanent tissues, and animal tissues including epithelial, connective, muscular, and nervous tissues. Understanding these microscopic building blocks is crucial as they form the structural and functional basis of all complex organisms. For board exams, questions from this chapter frequently test the differences between various tissue types, their locations, and their specialized roles in living bodies.
Start Learning FreeKey Concepts
Meristematic Tissue
Active dividing tissues found in the growing regions of plants like root tips and shoot tips, responsible for plant growth.
Permanent Tissue
Derived from meristematic tissues where cells have lost the ability to divide and have attained a permanent shape, size, and function.
Epithelial Tissue
Protective covering tissue in animals that forms the outer skin lining and covers internal organs and cavities.
Connective Tissue
Animal tissues that bind, support, and anchor other tissues and organs; examples include blood, bone, and cartilage.
Muscular Tissue
Contractile tissues responsible for body movements, categorized into striated, smooth, and cardiac muscles.
Nervous Tissue
Tissue made of neurons that receives and transmits impulses, coordinating body activities.
Important Formulas
Board Exam Info
In the West Bengal Board (WBBSE) Class 9 Annual Examination, this chapter typically carries around 6 to 8 marks. Common question types include short-answer questions (SAQs), multiple-choice questions (MCQs), and descriptive questions requiring diagrams or functional differences between plant and animal tissues, such as Xylem vs Phloem.
Frequently Asked Questions
What is the main difference between plant and animal tissues?
Plant tissues mostly provide structural support and contain dead supportive cells since plants are stationary, whereas animal tissues are specialized for active locomotion, coordination, and higher metabolic functions.
Why is meristematic tissue important for plants?
Meristematic tissues consist of actively dividing cells that allow plants to grow continuously throughout their lives in length and girth.
What are the components of Xylem and Phloem?
Xylem consists of tracheids, vessels, xylem parenchyma, and xylem fibres. Phloem consists of sieve tubes, companion cells, phloem parenchyma, and phloem fibres.
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