Immune System Case Passport, BIO 304 Module 12

One case. Three panels. Drawn by hand.

This week you build a single three-panel case drawing on plain paper. No printer needed. Panel one is the normal anatomy and physiology, panel two is what goes abnormal in the case, and panel three is the treatment, drawn onto the same pathway so you can see exactly where each treatment acts and how. This screen is your coach: it walks you through each panel one step at a time. Given, not Googled. The learning happens in your hand.

Your case this week

The nail in the foot

Marcus, 34, steps on a nail in his garage. Two days later his foot is red, hot, and swollen, a faint red line runs up the inside of his leg, and there is a tender lump in his groin. In the ambulance the medic's first question is: when did you last have a tetanus shot? Marcus cannot remember. You will draw his case in three panels, and by the end you will be able to explain it start to finish, including where every treatment plugs in.

How to work it

Draw the three panels in order. Each one is a chapter of Marcus's case: normal, then abnormal, then treatment. When you finish you own one hand-made case poster that is worth far more before an exam than any typed notes.

What your paper looks like

Vertical panels

Horizontal rows

Set up one sheet either way: 1 Normal, 2 Abnormal, 3 Treatment. Pick whichever fits, but all three panels go on one page.

Hand-drawn, one page · this will be checked

Draw every panel yourself, on paper, with pencil, pen, or colored pencils. Not on an iPad or any device, and not with AI. All three panels must go on one page, and you upload that single page. One page only, and more than one page loses points, because following directions is part of the grade. Your drawings will be checked, so make them your own.

Why you, specifically

This course feeds a lot of fields: EMS and paramedic programs, radiologic technology, and mortuary and funeral service, among others. Every panel carries a Field note connecting the anatomy to what you will actually see in your work.

Learning objectives

Draw the normal anatomy and physiology of lymphatic drainage and the immune response to a skin breach.
Diagram what goes wrong in a spreading wound infection: the abnormal anatomy and physiology.
Research one first-line drug for the case, show its mechanism in plain language, and demonstrate its impact by drawing a before and after, not by writing.
Distinguish active from passive immunity using the case.
Narrate the whole case, normal to abnormal to treatment, from your own drawing.

Estimated time2 to 4 hours. Panel one is the biggest build. Panels two and three go faster once the pathway is drawn.

Materials neededOne sheet of paper, with all three panels on that single page. A pen or pencil and two or three colors, hand-drawn only (no tablets, no AI). Plus the Module 12 videos, slides, reference sheets, and your textbook figures.

What you submitOne clear photo of one page with all three panels on it, one page only (more than one page loses points). Be ready to tell Marcus's whole case from your drawing.

Anatomy and physiologyPanel one carries the normal structure and function; panel two the abnormal structure and function; panel three the treatment mechanism. Both anatomy and physiology are graded.

What you are making: the normal pathway, intact defenses, lymphatic drainage, and the full immune response that clears a small breach and leaves memory behind.

Marcus's case · the baseline

Before we break anything, draw how Marcus's body is supposed to work. This is the normal that every abnormal finding in panel two is measured against.

Field note

Every field starts from normal. A medic, a rad tech, and an embalmer can only recognize "wrong" because they know "normal" cold. This panel is your normal.

Set up your paper: Divide a large sheet into three panels on one page, vertical columns or horizontal rows. Head the first panel NORMAL. You will build the healthy pathway from the skin down to lasting immunity.

Step 1 of 6

At the top, draw a foot with intact skin. Label the skin as the first-line barrier (physical, plus acid and normal flora). Note: normally this keeps bacteria out entirely. Mark this step done
Below it, draw the lymphatic route: lymphatic capillary → vessel with valves → inguinal (groin) node → up to the thoracic duct → left subclavian vein. This returns leaked fluid and lets nodes screen for invaders. Mark this step done
Draw a normal lymph node on the route. Show B cells in the cortex and T cells in the paracortex. Label it "surveillance checkpoint." Mark this step done
Draw the normal response to a tiny breach, with arrows along the pathway: innate first responders (neutrophil, then macrophage) → a dendritic cell carries antigen to the node → activates helper T (CD4) and B cells → B cells make antibodies (IgM first, then IgG) and memory cells; a cytotoxic T cell handles any infected cells. Mark this step done
In the corner, draw a small antibody-response graph: a low, slow primary curve, then a fast, tall secondary curve. Label it "memory equals a fast second response. A vaccinated person is already here." Mark this step done
Write the one-line normal summary: the barrier holds, and if it is breached, innate plus adaptive immunity clear the invader and leave memory behind. Mark this step done

I drew this panel by hand with pencil, pen, or colored pencils, not on a device or with AI.

What you are making: you research one first-line drug for this case, show what it does in plain terms, and prove its impact on the pathway with a before-and-after drawing, pictures, not paragraphs.

Marcus's case · the fix

Now fix Marcus. Every treatment works at a specific spot on the pathway you just drew. Show where, and show how.

Field note

This is the tetanus decision every EMS and ER clinician makes on a puncture wound, and the reason people who work around blood and bodies keep their own shots current.

Set up your paper: Head the third panel TREATMENT. Lightly redraw the pathway spine, then attach each treatment where it acts.

Step 1 of 6

Pick ONE first-line drug from this case to research: the antibiotic that fights the wound infection, the tetanus vaccine (Tdap) that builds Marcus's own immunity, or tetanus immune globulin (TIG) that lends antibodies right now. Write only the name you chose on your panel, then look up in plain terms what it does. Mark this step done
Capture the mechanism as a plain-language idea, not a paragraph. Three to five words or a small symbol, for example "kills the bacteria," "teaches memory," or "borrowed antibodies now." That is all the text this drug gets. Mark this step done
Draw the drug acting at its exact spot on the pathway: an arrow from your drug to where it works. Antibiotic to the bacteria in the tissue and lymphatics; vaccine to the B cell and memory step; TIG to the bloodstream. Mark this step done
Demonstrate the impact with a picture, not words, using a before-and-after. Antibiotic: bacteria thick along the red streak, then dying and the streak fading. Vaccine: no memory, then memory cells and a tall fast secondary curve. TIG: toxin loose in the blood, then antibodies clamped onto it. Let the two drawings carry the message. Mark this step done
Follow the impact down the pathway with drawing only: show the infection retreating and the node calming as your drug takes effect. Arrows and simple before-and-after marks, no sentences. Mark this step done
The real test. Tell Marcus's whole case out loud, and when you reach treatment, say in plain language how your chosen drug works and point to your before-and-after drawing. Write the single hardest sentence to say from memory, and re-draw that spot. Mark this step done

I drew this panel by hand with pencil, pen, or colored pencils, not on a device or with AI, and told the whole case out loud from my three panels.

Why you draw it, and how to use it

Why drawing it works

Drawing from memory is retrieval practice: pulling the answer out of your own head is what builds lasting memory, far more than rereading.
Turning words into a picture is dual coding, so you store each idea twice and can find it faster on exam day.
One running case ties it together, so you remember it as a story, not a pile of facts.
Redrawing the part you got wrong is the effortful practice that actually sticks.

How to get the most out of it

Draw each panel from memory first. A little struggle is the point, do not peek.
Keep the video and your book open. Pause, look things up, and add what you missed.
Say the case out loud from your own drawing. If you can tell it without notes, you know it.
Go back and redraw whatever was hardest to say.

How AI helps, and how it does not

Good uses: ask it to quiz you after you draw, or to explain a term you are stuck on.
Not a shortcut: it cannot draw your page or tell your case for you. If it does the work, you skip the exact thinking the exam will test.
The drawing in your own hand is the assignment, and the one thing AI cannot hand back to you.

The answer key is your self-check

It stays locked until after the due date, so there is nothing to copy while you work.
Once it unlocks, open Show me the target on each panel and compare it to what you drew.
It is not a picture to trace. It is a short checklist of what your panel should show, so you can catch what you missed and fix it.