| A | B |
|---|
| Hypothesis | Second step of the scientific method. |
| System | Several organs working together to perform a function |
| Organ | Several tissues working together to perform a function |
| Regulate | To Control |
| Digestive System | System responsible for breaking down food into smaller pieces |
| Muscular System | System that allows for movement |
| Skeletal System | System that allows for support and protection |
| Mechanical Breakdown | When you chew your food |
| Chemical Breakdown | Breakdown that involves chemicals in the stomach |
| Nutrients | Small pieces of food that get absorbed |
| Absorption | Nutrients are taken into your blood |
| Bones | Living tissue made by cells |
| Joints | Place where 2 bones meet |
| Ligaments | Long fibers that attach bones to one another |
| Tendons | Attaches muscle to the bone |
| Nervous System | System that includes brain, spinal cord and nerves |
| Neurons | Nerve Cells |
| Sensory Neurons | Nerve cells that sense the environment |
| Motor Neurons | Nerve cells that send messages to your muscles |
| Interneurons | The nerves in your brain and spinal cord |
| Respiratory System | Responsible for carrying oxygen and carbon dioxide in and out of the body |
| Alveoli | The air sacs in the lungs where oxygen and carbon dioxide exchange occurs with the blood |
| Trachea | Windpipe where air goes in and out of your lungs |
| Circulatory System | The network of veins and arteries & blood in your body |
| Valve | Structures in the heart that help the blood flow in one direction |
| Ventricle | Bottom 2 chambers of the heart; blood is pumped out of the heart through these chambers |
| Atrium | Top 2 chambers of the heart; blood enters the heart through these chambers |
| Arteries | Large blood vessels that carry blood away from the heart |
| Veins | Large blood vessels that carry blood towards your heart |
| Blood Vessels | A network of tubes around the body that carry blood |
| Capillaries | Blood vessels with walls so thin oxygen, carbon dioxide and waste can pass through |
