Needed substances are carried to the body cells by
blood
100
Dust in the air that enters the nose is trapped by a sticky substance called ___________
mucus
100
Blood is pumped through blood vessels by the action of the organ known as the _______
heart
100
The movement of air into and out of the lungs is called
breathing
100
What is the function of the epiglottis?
closes over the larynx when swallowing
200
Blood vessels that carry blood AWAY from the heart are called
arteries
200
Hair like structures that line the nasal cavities and trachea are called
cilia
200
These structures prevent blood from flowing backwards
valves
200
What produces a persons voice?
vocal cords/ larynx
200
Each alveolus is surrounded by a network of
capillaries
300
When blood flows into the right atrium from the body, it contains (a lot/ a little) oxygen and (a lot / a little) carbon dioxide
it contains A LITTLE oxygen and A LOT of carbon dioxide.
300
Where in the respiratory system does gas exchange occur?
in the alveoli
300
The function of the atria is to
What is receive blood that comes into the heart
300
During gas exchange what substance moves from the alveoli into the blood.
oxygen
300
What instrument is used to measure blood pressure?
sphygmomanometer
400
In which vessels are materials exchanged between the blood and the body cells?
capillaries
400
which parts of the respiratory system divide into smaller and smaller tubes in a pattern that resembles the branches of a tree?
bronchi/bronchioles
400
Blood pressure is caused by the force with which the _____________ contract
the ventricles
400
What substances are produced during respiration?
carbon dioxide and water
400
How many loops does the circulatory system contain?
two
500
The group of cells called the _______ regulates the rate at which the heart beats
SA node / pacemaker
500
What is the dome-shaped muscle that plays an important role in breathing
the diaphragm
500
What are the primary functions of the cardiovascular system?
carrying oxygen, glucose, and other needed materials to the cells
carrying waste products away from the cells
transporting cells that attack disease-causing microorganisms
500
The role of the respiratory system is to bring what substance into the body?
Oxygen
500
Alveoli have a large ________ that enables them to absorb a large amount of oxygen