Human Body Systems And Functions

What you’ll learn in this quiz

This quiz covers the main human body systems (like circulatory, respiratory, digestive, nervous, and skeletal) and the basic jobs they perform. You’ll practice matching systems to functions and identifying which organs belong where.

Each question has 4 answer options and there’s no timer, so you can think through the choices and learn from mistakes without pressure.

Common pitfalls to watch for

Many mix up similar roles (for example, “gas exchange” vs. “transport of oxygen”) or confuse which system an organ belongs to. Another frequent slip is choosing a system based on a single organ instead of the system’s overall function.

• Confusing respiratory gas exchange with circulatory transport
• Mixing up endocrine vs. nervous system control and signaling
• Forgetting that the kidneys are part of the urinary (excretory) system
• Assuming the immune system is the same as the lymphatic system in every context
• Overlooking that muscles work with the skeletal system for movement

Difficulty and question count settings

This quiz is set to Easy, so it emphasizes foundational facts and widely taught definitions rather than tricky exceptions. To balance challenge, questions vary between straightforward “what does this system do?” items and simple organ-to-system matches.

Your question count is currently set to 0, which usually means the quiz won’t start until you pick a number of questions. Select a question count and (if available) adjust difficulty before you begin to tailor the length and challenge to your study session.