This is the physical barrier that prevents pathogens from coming into the body.
What is the skin?
These structures, also part of the skeletal system, crush that has entered the mouth.
What are the teeth?
This is the main organ of the circulatory system.
What is the heart?
This is the scientific name for ONE nerve cell.
What are neurons?
These are chemical messages sent throughout the body by the endocrine system.
What are hormones?
This the second level of defense in you immune system
What are white blood cells?
Food travels down this long tube from the mouth to the stomach.
What is the esophagus?
What is oxygen?
These are the parts of the nervous system.
What is the brain, spinal cord, and nerves?
Double Jeopardy: This gland produces insulin to regulate/control blood sugar levels in your body.
What is the pancreas?
What is a pathogen?
This is where most of the nutrients from your food is absorbed into the bloodstream to be transported through the body via the circulatory system.
What is the small intestines?
This type of blood vessel takes oxygenated blood away from the heart.
What is an artery?
Unlike the endocrine system, the nervous system sends these types of messages.
What is electrical?
This is the general name for the organs that produce hormones in your endocrine system.
What are glands?
These proteins are produced by white blood cells to identify pathogens that might be in the body.
What are antibodies?
Double Jeopardy: This organ has acid strong enough to melt your other organs.
What is the stomach?
This gas is exhaled by animals, but plants "breathe" it in and use it to produce oxygen.
What is carbon dioxide?
Unlike the endocrine system, the nervous system sends out short and ________ messages to and from your brain.
What is quick/fast?
Unlike the nervous system, the endocrine system sends these types of messages to different parts of the body.
What is chemical?
These molecules cover the pathogen.
What are antigens?
This part of the respiratory system is sometimes confused with the esophagus.
What is the trachea?
Small air sacs in the lungs which allow oxygen and carbon dioxide to move between the lungs and blood stream.
What are aveoli?
This is anything that triggers a behavioral or physical change in your body.
What is a stimulus?
This chemical makes human blood red.
What is iron?