Circulatory System
This muscular organ pumps blood to every part of your body.
The heart
These are the two main organs used for breathing.
Lungs
This organ acts as the "control center" or "boss" of the entire body
The brain
This stretchy, J-shaped organ uses strong acids to turn your lunch into a liquid called chyme.
The stomach
This set of bones protects your brain.
skull
These blood vessels carry blood away from the heart to your organs.
Arteries
This is the scientific name for your "windpipe" that leads to the lungs.
Trachea
This long bundle of nerves runs down your back and connects the brain to the rest of the body.
Spinal Cord
These two bean-shaped organs act as the body's primary filters, cleaning waste out of your blood.
The Kidneys
These tough bands of tissue connect one bone to another bone at a joint.
Ligaments
These specific blood cells are responsible for fighting off germs, bacteria, and viruses.
White Blood Cells
This is the waste gas that your respiratory system removes from your body when you exhale.
Carbon Dioxide (CO2)
This is the name for the "trigger" or change in the environment (like a loud noise) that causes your nerves to send a message.
A Stimulus
Most of the nutrients from your food are absorbed into the bloodstream through the walls of this 20-foot-long organ.
The Small Intestine
This type of muscle is found only in the heart and never gets tired.
Cardiac Muscle
These are the microscopic, thinnest blood vessels where oxygen and nutrients are swapped for waste.
Capillaries
This dome-shaped muscle under your lungs contracts and flattens to help you breathe in.
Diaphragm
This is an automatic, lightening-fast action that happens without you thinking, like pulling your hands off a hot stove.
A Reflex
This muscular sac holds liquid waste (urine) until the body is ready to get rid of it.
The bladder
These tissues connect your muscles to your bones so that you can move.
Tendons
The heart is divided into four sections called this.
Chambers
These are the tiny, grape like air sacs where oxygen actually enters the blood.
Alveoli
This specific part of the brain is responsible for your balance, posture, and coordination.
Cerebellum
This multi-tasking organ produces bile to break down fats and also filters toxins out of the blood.
The Liver
Muscles can only do this action; they cannot "push".
Pull (or contract)