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Ch. 1 Introduction to Anatomy and Physiology
Chapter 1, Problem 1.41a

Groups of many cells working together to perform a common function are known as a(n):


a. cell.
b. organ.
c. organ system.
d. tissue.

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1
Identify the key concept in the question, which is 'groups of many cells working together to perform a common function'.
Recall the hierarchy of biological organization: cells, tissues, organs, organ systems, and organisms.
Understand that a tissue is a group of similar cells that work together to perform a specific function.
Consider the options provided: a. cell, b. organ, c. organ system, d. tissue.
Determine which option best matches the definition of a group of cells working together, which is 'd. tissue'.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Cell

A cell is the basic structural and functional unit of all living organisms. Cells can exist as independent entities, such as bacteria, or as part of multicellular organisms, where they perform specialized functions. Understanding cells is fundamental to biology, as they are the building blocks of life.
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Tissue

Tissue is a group of similar cells that work together to perform a specific function. In multicellular organisms, tissues are organized into four main types: epithelial, connective, muscle, and nervous tissue. Each type has distinct roles, such as protection, support, movement, and communication.
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Organ

An organ is a structure composed of two or more types of tissues that work together to perform specific functions within an organism. Examples include the heart, lungs, and liver. Organs are part of organ systems, which coordinate complex functions necessary for survival.
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