Organs and their primary functions

What you’ll practice

From brain to bladder, this quiz helps you connect each organ with its primary job—what it does most importantly in the body.

You’ll also reinforce basic anatomy logic (system-level thinking) so you can distinguish similar roles, like filtration vs. digestion vs. gas exchange.

Format and difficulty settings

Each question has 4 options and there’s no timer, so you can think through function clues without rushing.

Pick how many questions you want to answer and set the difficulty to match your goal: shorter sets for quick review, longer runs for full coverage. The mixed setting balances easier “core organ” items with tougher, detail-based ones.

Common pitfalls to avoid

Many wrong answers come from confusing organs within the same system or mixing up “primary” vs. “secondary” functions (for example, what an organ mainly does versus what else it can do).

Watch for wording that points to the main role (e.g., oxygen exchange, hormone secretion, waste filtration) rather than a related process.

Quick tips for higher scores

• Read for the key verb: filters, secretes, stores, pumps, absorbs, exchanges
• Separate organ vs. gland vs. structure (e.g., liver vs. gallbladder)
• Don’t swap similar pairs: stomach vs. small intestine, kidneys vs. bladder, trachea vs. esophagus
• Use system context: circulatory, respiratory, digestive, nervous, endocrine, urinary
• When stuck, eliminate options by location and “main job” first