Heart Basics
This muscular organ is divided into four chambers and acts as the primary pump.
What is the Heart?
These tiny, grape-like air sacs are where oxygen and CO2 exchange occurs.
What is Alveoli?
By definition, these vessels always carry blood away from the heart.
What is Arteries?
This iron-rich protein in red blood cells binds to oxygen.
What is Hemoglobin?
The large, dome-shaped muscle that is the main driver of breathing.
What is Diaphragm?
This chamber receives deoxygenated blood returning from the rest of the body.
What is Right Atrium?
The 'Pulmonary Circuit' refers to the flow of blood between these two organs.
What is Heart and Lungs?
These unique veins carry oxygenated blood from lungs back to the heart.
What is Pulmonary Veins?
The yellowish liquid portion of blood carrying nutrients and hormones.
What is Plasma?
When the diaphragm contracts and moves down, chest pressure does this.
What is Decreases (Inhalation)?
These flap-like structures in the heart and veins prevent blood from flowing backward.
What is Valves?
This 'windpipe' is reinforced with rings of cartilage to stay open.
What is Trachea?
The largest artery in the human body, exiting the left ventricle.
What is Aorta?
These blood components are responsible for forming clots to stop bleeding.
What is Platelets?
Exercise causes a buildup of this waste gas, signaling the brain to breathe faster.
What is Carbon Dioxide?
Which chamber of the heart has the thickest, most muscular wall?
What is Left Ventricle?
Correct path air takes entering: Trachea -> Bronchi -> ? -> Alveoli
What is Bronchioles?
Red blood cells must often move in single file to pass through these tiny vessels.
What is Capillaries?
In a reading like 120/80, the top number (120) represents this pressure.
What is Systolic?
These tiny hairs in the respiratory tract sweep away mucus and dust.
What is Cilia?
The 'pacemaker' of the heart that starts the electrical signal.
What is SA Node?
The wall of tissue that separates the left and right sides of the heart.
What is Septum?
Vessel carry blood from the lungs back to the heart.
What is Pulmonary Vein?
The 'lid' that closes over the larynx to prevent food from entering the lungs.
What is Epiglottis?
The medical term for the 'voice box' containing vocal cords.
What is Larynx?