Immune System Quiz

What the six questions ask about

The immune system quiz covers the body’s defenses as anatomy describes them: the barriers that stand first, and the cells that do the defending. Its 6 questions ask what the players are called and which layer of defense each belongs to.

The word defense here is structural, not medical. There is no advice about staying well and nothing about illness — only the names and roles that a textbook assigns.

Checked twice before it reaches you

Every Cross Section answer comes out of a dataset with 200 fixed keys that two authors completed in isolation from each other. Comparing the two finished copies value by value produced full agreement — 200 matches out of 200. Agreement is the price of admission: an answer both authors cannot vouch for independently is an answer the site refuses to quiz on.

Play, check, review

Four options come with every question. Choose, and the marking is instant, with the correct answer shown even when your pick was wrong. The 6 questions close with a full review of the set, and your best score stays in your browser to be beaten later. There is no signup and nothing to download — the quiz is part of the page.

• 6 questions on barriers and defensive cells
• Four options, instant right-or-wrong marking
• Correct answer shown on every question
• Best score saved locally, no signup