Why Tissues Are Needed
A tissue is a group of similar cells that work together to perform a specific function in an organism.
Practice This ConceptMain explanation
Teacher explanation
In multicellular organisms, one cell cannot do every job efficiently. Different groups of cells become specialised, so division of labour happens. Tissues combine to form organs, and organs work together as organ systems.
Example
Muscle cells form muscle tissue for movement, while nerve cells form nervous tissue for sending messages.
Simple analogy
Same job, same team: that team is a tissue.
Common confusion
Students often write that tissues are needed only because organisms are large, but the better answer is division of labour and specialised function.
Exam tip
In answers, arrange the order as cell, tissue, organ, organ system, organism, and mention specialisation.
Answer writing and exam use
1-mark use
Write the exact meaning of why tissues are needed in one clean line.
2-mark use
Define why tissues are needed and add one example or condition.
3-mark use
Explain why tissues are needed, show the method or example, and mention the common mistake.
Practice this concept with focused MCQs
Open the concept quiz intro first, review the test details, and then start a focused MCQ set from this concept only. Instant score and answer review are live now.
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