Class 9 Science - BIHAR
Tissues in Action
The chapter 'Tissues in Action' builds directly upon the fundamentals of cell biology, exploring how groups of cells coordinate to form tissues in both plants and animals. For Class 9 Bihar Board students, this chapter is crucial as it bridges the gap between basic cellular structure and complex organ systems. You will learn about meristematic and permanent tissues in plants, as well as epithelial, connective, muscular, and nervous tissues in animals. Mastering these concepts is essential for scoring well in both objective and subjective BSEB biology examinations.
Start Learning FreeKey Concepts
Plant Tissues Classification
Plant tissues are broadly divided into meristematic (actively dividing cells responsible for growth) and permanent (cells that have taken up a specific shape and lost the ability to divide) tissues.
Meristematic Tissue
These are growth tissues found in specific regions of plants like root tips and shoot tips, categorized into apical, lateral, and intercalary meristems based on their location.
Permanent Tissue
Formed from meristematic tissues after they lose the ability to divide. They can be simple (parenchyma, collenchyma, sclerenchyma) or complex (xylem and phloem).
Animal Tissues
Animal tissues are grouped into four primary types based on their function and structure: epithelial (protective covering), connective (binding and supporting), muscular (movement), and nervous (transmission of impulses).
Blood as a Connective Tissue
Blood is a fluid connective tissue consisting of plasma, red blood cells (RBCs), white blood cells (WBCs), and platelets, responsible for transporting gases, nutrients, and waste products.
Important Formulas
Board Exam Info
In the Bihar School Examination Board (BSEB) Class 9 Science exams, this chapter typically carries around 6 to 8 marks. Questions usually include objective multiple-choice questions (MCQs), short-answer questions differentiating between types of tissues (like xylem vs. phloem or meristematic vs. permanent), and diagram-based questions on neuron structure or stomata.
Frequently Asked Questions
What is the main difference between meristematic and permanent tissues?
Meristematic tissues consist of actively dividing cells that help in plant growth, whereas permanent tissues are made of mature cells that have lost the ability to divide and perform specific permanent functions.
Why is blood called a connective tissue?
Blood is called a connective tissue because it connects different body parts, transports oxygen, nutrients, and waste materials, and has a fluid extracellular matrix called plasma.
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.
Learn Tissues in Action with Your AI Tutor
10 different ways to study this chapter. Free for 3 chapters per day.
Lecture
Key Points
Interactive
Quiz
Flashcards