Lungs
The little air sacs where gas exchange occurs
Alveoli
What is the top portion of the heart called?
Atrium
The posterior wall of the thoracic cavity are protected by____________.
Spine, scapula, and posterior ribs
What are the 2 phases of ventilation?
Inspiration and Expiration
De-oxygenated blood enters the heart via a vessel called ________.
Vena Cava
How many lobes do the right and left lung have?
Right lung- 3
Left Lung- 2
What are the vessels called that provide oxygen-rich blood to the heart tissue itself called?
Coronary arteries
What separates the thoracic cavity from the abdominal cavity?
Diaphragm
What part of the brainstem measures the pH of the CSF to stimulate inspiration?
Medulla Oblongata
What valve separates the left atrium from the left ventricle?
Bicuspid (Mitral) Valve
What are the 2 pleura called that line the lungs?
Visceral and Parietal Pleura
What are the names of the nodes where the electrical activity happens in the heart?
Sinoatrial node, Atrioventricular node, Bundle of his, & Purkinje fibers
What is it called where the bronchi bifurcate?
Carina
____________ is the volume of air inhaled in a typical breath.
Tidal Volume
What are the vessels called that surround the alveoli?
Capillaries
What is the name of the vessel that carries oxygenated blood back to the heart called?
Pulmonary vein
What is the sac surrounding the heart called?
Pericardium
How many true ribs, false ribs, and floating ribs are there?
7 True
3 False
2 Floating
___________ requires adequate onloading and offloading of oxygen at the cellular level
Internal respiration
What are the oxygen-rich vessels located in your shoulders?
Subclavian arteries
What is the fluid-like substance called that keeps the alveoli from collapsing?
Surfactant
What are the electrolytes that must be present in order for the heart to contract?
Potassium, Calcium, & Sodium
The _________ is a central compartment of the thoracic cavity
Mediastinum
The ____________pressure created by an increase in the size of the thoracic cavity creates the ability to inspire air.
negative
What does oxygen bind to on the RBCs?
Hemoglobin