Class 9 Science - ODISHA
Tissues in Action
The chapter Tissues in Action in Class 9 Science under the Odisha BSE board explores how cells group together to form tissues, which are the building blocks of multicellular organisms. Building on the fundamental unit of life, this chapter details both plant tissues (meristematic and permanent tissues like xylem and phloem) and animal tissues (epithelial, connective, muscular, and nervous tissues). Understanding these structures and their specific functions is crucial for students as it lays the physiological foundation for human and plant biology, frequently featuring in board exams through diagram-based and conceptual questions.
Start Learning FreeKey Concepts
Tissue
A group of cells that are similar in structure and work together to achieve a particular function in the body.
Meristematic Tissue
Active dividing tissues present in the growing regions of plants, such as the tips of roots and stems.
Permanent Tissue
Non-dividing plant tissues derived from meristematic tissue that have taken up a specific permanent shape, size, and function.
Xylem and Phloem
Complex permanent tissues in plants; xylem transports water and minerals, while phloem transports food from leaves to other parts.
Animal Tissues
Broadly classified into four types based on their functions: epithelial (protective), connective (binding), muscular (movement), and nervous (impulses).
Important Formulas
Board Exam Info
In the Odisha (BSE) Class 9 Science examinations, this chapter typically carries around 6 to 8 marks. Questions frequently include labeling diagrams of plant tissue sections (like stomata or xylem/phloem), distinguishing between meristematic and permanent tissues, and naming specific animal tissues and their functions.
Frequently Asked Questions
What is the main difference between meristematic and permanent tissues?
Meristematic tissues consist of actively dividing cells responsible for plant growth, whereas permanent tissues are made of mature cells that have lost the ability to divide and perform specific specialized functions.
Why are xylem and phloem called complex tissues?
They are called complex tissues because they are made of more than one type of cell that coordinate to perform a common function, such as transport.
What is the function of nervous tissue?
Nervous tissue is specialized for receiving stimuli and transmitting messages rapidly across the body, and it is found in the brain, spinal cord, and nerves.
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