Muscular system
What is Cardiac muscle?
This muscle type is found only in the heart and never gets tired.
What is the Heart?
This hollow, muscular organ acts as a double-pump for the body.
What is the Brain?
This organ is the "boss" of the body, interpreting all sensory input.
What are the Lungs?
These two spongy organs are the main site of gas exchange.
What are Bones?
These hard structures provide the "frame" for the body and protect organs.
What are Tendons?
These tough, fibrous cords connect your muscles to your bones.
What are Capillaries?
These are the smallest blood vessels where oxygen and nutrients actually enter the cells.
What is an Axon?
These are the specialized cells that send electrical "messages" throughout the body.
What is the Diaphragm?
This is the scientific name for the "windpipe" that leads to the lungs.
What is a Joint?
This is the place where two bones meet, such as the elbow or knee.
What is Contraction?
This is the process where muscle fibers shorten to pull on a bone.
What are Red Blood Cells?
These blood cells contain hemoglobin and are responsible for hauling oxygen.
What is a Synapse?
This thick bundle of nerves connects the brain to the rest of the body and is protected by the spine.
What are Alveoli?
These tiny, grape-like sacs in the lungs are where oxygen moves into the blood.
What is Bone Marrow?
This tissue, found inside the center of large bones, creates new blood cells.
What is the Skeletal system?
To move a limb, muscles must work in these—where one contracts and the other relaxes.
What is the Respiratory system?
This is the specific chamber of the heart that pumps oxygenated blood out to the entire body.
What is the Cerebellum?
This part of the brain, located at the back, is responsible for "muscle memory" and balance.
What is the Epiglottis?
This sheet of muscle flattens out to pull air into the lungs.
What are Ligaments?
These strong bands of connective tissue hold two bones together at a joint.
What is Muscle Fatigue?
This byproduct builds up in muscles during intense exercise when oxygen is low, causing a "burn
What is the Mitral (Bicuspid) valve?
his "liquid" part of the blood carries hormones, nutrients, and waste products.
What is the Sympathetic nervous system?
This division of the nervous system controls "automatic" functions like your heartbeat and digestion.
What is the Mitochondria?
This is the waste gas that the respiratory system removes from the blood.
What is Cartilage?
This type of smooth, flexible tissue covers the ends of bones to prevent them from rubbing together.