The Cardiorespiratory System 3-1 Flashcards
The cardiovascular system and the cardiorespiratory system together provide the kinetic chain with what (4)
Oxygen
Nutrients
Protective agents
And a means to remove waste by-products
The cardiorespiratory system is comprised for…?
Cardiovascular system and respiratory system
Provides optimal cellular function within the kinetic chain
The cardiorespiratory system
The cardiovascular system is comprised of…?
The heart, blood and blood vessels
A hollow muscular organ that pumps blood via rhythmic contraction
The heart
The heart muscle has similar characteristics to skeletal muscle except for the fact that it is an involuntary muscle. What is a involuntary muscle?
Involuntary muscles cannot be consciously contracted
The space in the chest between the lungs that contains all the internal organs of the chest except the lungs.
Mediastinum
How many BPMS is the typical adult heart rate?
70 - 80 BPMS
What is the function of the sinoatrial node (SA) also known as the “pacemaker”
It initiates the heartbeat
Where is the (SA) node located
The right atrium
Two small chambers of the heart that receives blood from the vines and pumps it to the ventricles
The atrium
Two large inferior chambers of the heart that receive blood from the atrium and pump them it to the arteries
Ventricles
Which atrium receives deoxygenated blood from the body
Right
Which atrium receives re-oxygenated blood from (ventricles) the heart?
Left atrium
Which ventricle receives blood from deoxygenated blood from the atrium and pumps it to the lungs to be saturated with oxygen
The right ventricle receives blood from the right atrium
Which ventricle receives re-oxygenated blood from the atrium and pumps it to the rest of the body
The left
What is the function of the atrioventricular valves and the semilunar valves
They prevent a back flow or spillage of blood back into the chambers
What is stroke volume (SV?)
The amount of blood that is pumped from the ventricle with each contraction
What is the stroke volume of the typical adult
Approximately 75-80 millimeters per beat
What is heart rate?
The rate at which the heart pumps
What is the heart rate of the typical adult
70 - 80 bpm beats per minute
Together heart rate and stroke volume are know as what?
Cardiac output (Q)
How long do you measure a pulse when your subject is at rest
60 seconds
Factors that may affect resting heart rate
Digestion Mental activity Environmental temperature Biological rhythms Body position Cardio fitness
When measuring a pulse during exercise how long do you count?
6 seconds
When measuring a pulse for only 6 seconds during exercise how do you calculate the HR?
Add a zero,, if you counted 12 beats adding a zero you give you 120 bps, or multiple by 10 which will also give you 120
This vital support mechanism provides an internal transportation, regulation and protection system for the kinetic chain
Blood
How much blood in in the average person
5 liters or 1 1/2 gallons
Blood is heavier that water and constitutes approximately what percent of body weight
8%
What does blood transport (4)
Oxygen and nutrition to tissue
Waste products from tissue
Hormones to tissues and organs
Heat throughout the body
What does blood regulate
Body temperature and acid balance
How does blood protect the body (2)
It protects the body from excessive bleeding by clotting
Contains specialized immune cells that help fight disease and sickness
The network of tubes throughout the body that circulates blood to and from the heart
Blood vessels
Muscular elastic tubes that carry blood from the heart
Arteries
Medium sized arteries divide into small arteries called….?
Arterioles
Arterioles branch out to microscopic vessels known as…
Capillaries
Oxygen , nutrients, hormones and waste products are exchanged between tissues in this typ of blood vessel
Capillaries
Name the vessels that collect blood from capillaries
Venules
Venules progressively merge with other venules to form what?
Veins
Very small vines that connect capillaries to larger vines
Venules
The smallest blood vessels which connect venules to arterioles
Capillaries
Small terminal branches of an artery which end in capillaries
Arterioles
Tubes that carry blood from the capillaries toward the head
Veins
