Indiana Science HS-AP9-2

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

The Standard

Analyze the relationship of the components of the lymphatic system with bone marrow and the thymus gland.

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

Teacher's field guide

What Students Need to Do: Students trace where B cells and T cells come from and where they mature. They explain how these cells reach lymph nodes and help respond to infection.
What Mastery Looks Like: A student can show that both cell types begin in bone marrow, B cells mature there, and T cells mature in the thymus. They can explain that lymph nodes bring these cells into contact with material from infected tissue.
Common Misconceptions: Students may think T cells start in the thymus rather than in bone marrow. They may also mix up where B and T cells mature or think lymph nodes are where both first develop.
How to Assess It: Ask students to draw two paths from bone marrow to a lymph node, one for a B cell and one for a T cell. Have them label where each cell matures.

Lesson moves

Use organ cards and two colored beads to trace B and T cell paths from bone marrow through maturation to a lymph node.
Ask students to write: Why might a neck lymph node swell during a throat infection, and how are bone marrow and thymus involved?
Give pairs mixed-up arrow cards showing B and T cell paths; have them fix the order and explain each move.
Show a diagram of a vaccine response and ask students to mark where the responding B and T cells matured.

Free download

A ready-to-print activity worksheet aligned to HS-AP9-2, with an answer key for the teacher on its own page. No account needed.

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