exam- respiratory system Flashcards
Conducting System
Nasal Cavity
• Larynx / Pharynx
• Trachea
• Bronchi
Conducting System Function
• Warms • Filters • Moistens • Delivers Air to the gas exchange regions of lungs (alveoli)
components of the circulatory system
- heart
- blood
- blood vessels
blood vessels
- arteries
- capillaries
- veins
- arteries DONT allow transfer, further away from the heart the smaller they get
- cant transfer but can move
- carry blood away from the heart
- usually oxygenated blood
- withstand high pressure - capillaries transfer blood to your tissues (gases, nutrients)
- EXHANGE, DIFUSE, TRANSFER GASES
- let air & small particles through (gases, nutrients)
- thin walled - veins return blood to the heart
- blood in the veins have no pressure - little movement
- need assistance in returning blood to the heart
- veins have valves
vasoconstriction
when the muscle contracts and the artery gets smaller (restricted)
- reduces opening
- reduced blood flow
vasodilation
when the blood vessel (muscle around the artery) relaxes
- opening becomes bigger
- heavier blood flows
HEART
left side - oxygenated
right side - un oxygenated
-muscular pump
function of the heart
- deliver oxygen/nutrients
- removes waste
- maintains body temp
-fuel (muscle)
contract > pump blood
relaxes > fills up with blood
ATRIA
- upper chambers
- left/right
- receives blood from body lungs
- left side - oxygenated back from the lungs
VENTRICLES
- lower chambers
- left side- to body cells
SEPTUM
- right side - to lungs de ox
- divides the heart into left and right
VALVES
- allow blood flow in one direction only
- are between the atria
heart rate
- the number of beats in 1 minute
blood pressure
-SYSTOLIC - HIGH
the pressure in the arteries when the left ventricle contracts and forces blood out of the heart
-DIASTOLIC- HEALTHY 120
the pressure in the arteries when the left ventricles relates refills and therefore blood flow drops
stroke volume
- the amount of blood pumped by the left ventricle per beat (contraction), rest 75-100ml
cardiac output
- the amount of blood pumped from the left ventricle in a minute
stroke volume x heart rate = cardio output
mechanics of breathing
increased volume, pressure drops
decreased volume, pressure increases
pleura
attaches to your ribs
diaphragm
is a muscle
alveoli
end of bronchioles, exchange gases (only place), alveoli is wrapped up in millions of capillaries to allow exchange of gases
SITE OF GASEOUS EXCHANGE
path of blood
lungs left atrium left ventricle right ventricle right atrium body
