Humans are composed of cells, tissues, organs and systems - Junior Cycle Science - Question b - 2013
Question b
Humans are composed of cells, tissues, organs and systems.
What is meant by each of these terms?
Cell ______________________________________________________________... show full transcript
Worked Solution & Example Answer:Humans are composed of cells, tissues, organs and systems - Junior Cycle Science - Question b - 2013
Step 1
Cell
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Answer
A cell is the fundamental unit of life, often described as the smallest structural and functional unit of an organism. Cells can exist as independent units (like in unicellular organisms) or as part of a multicellular organism where they perform specialized functions.
Step 2
Tissue
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A tissue is a group of cells that work together to perform a specific function. These cells are similar in structure and function, allowing them to coordinate efforts towards a common goal, such as muscle contraction or transporting nutrients.
Step 3
Organ
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An organ is composed of two or more different types of tissues that work together to perform a specific function or group of functions. For example, the heart is an organ made up of muscle tissue, connective tissue, and nervous tissue, working together to pump blood.
Step 4
System
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A system, in biological terms, refers to a complex network formed by two or more organs that collaborate to carry out a particular function that maintains the organism's health. For instance, the respiratory system includes organs like the lungs and trachea, working together to facilitate breathing.
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