Command and Control
This organ acts as the main control center or "boss" of the body, sending and receiving signals to control everything you do.
What is the brain?
This muscular, J-shaped sac churns your food and mixes it with strong acids to break it down into a liquid.
What is the stomach?
Made of 206 bones in an adult, this internal system gives the body its shape and protects fragile organs like the brain and heart.
What is the skeleton?
These underground structures anchor a plant into the soil and absorb water and dissolved minerals.
What are roots?
Mammals, birds, reptiles, amphibians, and fish all belong to this major group because they possess a backbone.
What are vertebrates?
These two spongy organs expand and contract to bring oxygen into the body and get rid of carbon dioxide waste.
What are the lungs?
Most of the chemical digestion takes place here, where nutrients are finally absorbed out of food and into the bloodstream.
What are the intestines? (Accept small intestine)
This vital organ continuously contracts and relaxes without ever resting to pump blood through your blood vessels.
What is the heart?
These flat, green plant structures act like solar panels, absorbing sunlight to carry out photosynthesis and make food.
What are leaves?
Making up over 95% of all animal species on Earth, this massive group includes insects, spiders, and crabs that completely lack a backbone.
What are invertebrates?
This large organ protects your body from germs, regulates your temperature, and is your largest sensory organ.
What is the skin?
This large organ cleans the blood, stores nutrients, and produces a green fluid called bile to help break down fats.
What is the liver?
Because these tissues can only pull and can never push, they must work in pairs to move your bones back and forth.
What are muscles?
This structure supports the leaves and flowers, and acts as a highway to transport water and nutrients throughout the plant.
What is the stem?
Unlike mammals, this group of cold-blooded vertebrates has dry, scaly skin, breathes with lungs, and lays leathery eggs on land.
What are reptiles?
This entire group of structures—which includes your eyes, ears, nose, and tongue—gathers information from the outside world and passes it directly to the nervous system.
What are the sensory organs?
Located right behind the stomach, this organ produces digestive enzymes for the intestines and secretes insulin to manage the body's blood sugar levels.
What is the pancreas?
This hollow, expandable muscular sac acts as a temporary storage unit for liquid waste before it is eliminated from the body.
What is the bladder?
The organ in plants responsible for reproduction by producing seeds.
What is a flower?
While humans rely on an internal skeleton for support, insects and crabs protect their internal organs using this rigid outer covering.
What is an exoskeleton?
While most organ systems work to keep an individual alive day-to-day, this specific group of organs has the unique primary purpose of ensuring the survival of the entire species.
What are the reproductive organs?
These two bean-shaped organs act as the body's master filtration system, constantly cleaning liquid waste out of your blood to create urine.
What are the kidneys?
Your skeleton does more than just support you; the inside of certain large bones contains a soft tissue called marrow that has this crucial job for the circulatory system.
What is making blood cells?
The process by which plants bend during growth towards light to make energy using sunlight.
What is phototropism?
This specific group of cold-blooded vertebrates undergoes a dramatic structural transformation, starting life hatching from eggs in water with gills, and developing lungs and legs later to live on land.
What are amphibians?