The
The main organ of the circulatory system is the __________.
HEART
As blood moves through the capillaries, it leaves __________ behind for the cells to use.
OXYGEN
The __________ are small air sacs in the lungs.
ALVEOLI
The Bronchial Tubes connect to the __________, which is also called the windpipe.
TRACHEA
The __________ is a flap of skin that keeps food out of the trachea.
EPIGLOTTIS
The heart moves __________ around your body.
BLOOD
The blood picks up __________ __________ and water as waste products from the cells.
CARBON DIOXIDE
The left ventricle pumps blood to your __________.
BODY
Carbon Dioxide and water leave the lungs when you __________.
EXHALE
If food gets caught in the trachea, you will automatically __________ until the food comes out.
COUGH
Blood leaves the heart through the __________, the largest artery in your body.
AORTA
The heart has four __________.
CHAMBERS
The alveoli build into larger and larger passages until they become the __________ __________.
BRONCHIAL TUBES
__________ is another name for Breathing.
RESPIRATION
During an __________ attack, the bronchial tubes become narrow and sore.
ASTHMA
Blood returns to the heart through the _______ _______, your body's largest vein.
VENA CAVA
The top two chambers of the heart are the __________.
ATRIUMS
Carbon Dioxide and water leave the bloodstream as blood travels through the __________ that line the alveoli.
CAPILLARIES
The large muscle on the floor of the chest cavity that causes breathing is the __________.
DIAPHRAGM
Coughing and sneezing are __________ of both a cold and influenza.
SYMPTOMS
__________ are the smallest blood vessels in your body.
CAPILLARIES
The bottom two chambers of the heart are the __________.
VENTRICLES
Blood flows from the right ventricle to the __________, where it picks up oxygen and drops off waste products.
LUNGS
In the nose, tiny hairs called ____(1)____ and a sticky, slime-like substance called ____(2)____ filter dust and dirt from the air.
(1) CILIA
(2) MUCUS
Washing your __________ helps prevent the spread of germs that cause colds and other respiratory illnesses.
HANDS