Order organization levels

Supplied materials

• All measurements and observations below are supplied classroom examples. They are not data from actual learners or a claim about a particular real site.
• Paper or a browser document for a labeled drawing, table or explanation.
• Worked problem inputs: A heart drawing includes muscle, connective and nerve tissues. Explain why calling the whole heart one tissue is inaccurate.
• Assessment case 1: One muscle cell is removed from a modeled sheet of similar cooperating muscle cells. What remains conceptually distinct? Which inference or prediction is best supported?
• Assessment case 2: Which scientific label fits the specifically described step or feature? Supplied case: Muscle tissue.
• Assessment case 3: Which scientific label fits the specifically described step or feature? Supplied case: Heart containing several tissues.
• Assessment case 4: Which scientific label fits the specifically described step or feature? Supplied case: Circulatory system.
• Assessment case 5: Which scientific label fits the specifically described step or feature? Supplied case: One nerve cell.
• Assessment case 6: A stomach diagram shows several tissue types contributing to one digestive role. What follows? Which inference or prediction is best supported?

Learn the idea

In multicellular organisms, cells can form tissues, organs and interacting organ systems. An organ often includes several tissue types. A cell is not a tiny complete organ system.

Cell means smallest living structural unit here. Tissue means group of cells with related functions. Organ means structure made of tissues with a function. Organ system means interacting organs serving major functions.

For the supplied mechanism problem, A heart drawing includes muscle, connective and nerve tissues. Explain why calling the whole heart one tissue is inaccurate. An organ contains multiple tissues cooperating in a function. Heart muscle is one tissue component; the whole heart is an organ participating in a circulatory system.

1. Read the supplied problem and mark the structures, processes or quantities named: A heart drawing includes muscle, connective and nerve tissues. Explain why calling the whole heart one tissue is inaccurate.
2. Draw the relevant boundary, pathway or comparison and label it using the scientific ideas above.
3. Write a causal explanation or calculation, showing how each observation supports the result.
4. Compare your reasoning with the worked solution; name a condition that would change or limit the inference.

Check your reasoning

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Take it further

New task: draw a stomach containing muscle, lining and nerve tissues, then connect it to a digestive-system box. Expected: tissues contribute to an organ; interacting organs form a system. The stomach is not one tissue.

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