Indiana Science HS-AP9-1

ScienceGrades 9–12Transport, the Lymphatic System and Immune Mechanisms

The Standard

Identify the primary structural and functional components of the lymphatic system.

Indiana Academic Standards for Science (2023) · Transport, the Lymphatic System and Immune Mechanisms

Teacher's field guide

What Students Need to Do: Identify lymph capillaries, vessels, nodes, the spleen, and the thymus on a body diagram. Explain how lymph returns fluid to the blood and how these parts help defend the body.
What Mastery Looks Like: Students label the main parts and trace tissue fluid through lymph vessels back to a vein. They explain that nodes filter lymph, the spleen filters blood, and the thymus matures T cells.
Common Misconceptions: Students may think lymph vessels carry blood or that nodes pump lymph. They may also say the spleen filters lymph, rather than blood.
How to Assess It: On a blank body outline, have students label a lymph capillary, vessel, node, spleen, and thymus. Ask them to draw fluid’s path back to a vein and name what nodes and the spleen filter.

Lesson moves

Lay yarn on a body outline to trace lymph from tissue through a capillary, vessel, and node to a vein.
Ask: Why might a neck node swell during a sore throat, and what is it filtering?
Give pairs cards naming lymph parts and their jobs; have them match the cards and explain each choice.
Show a photo of a swollen ankle and ask students to trace how extra tissue fluid normally returns to a vein.

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A ready-to-print activity worksheet aligned to HS-AP9-1, with an answer key for the teacher on its own page. No account needed.

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