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HSCI 3000 - Week 5 Notes

by: Nancy Kanarski

HSCI 3000 - Week 5 Notes HSCI

Marketplace > East Tennessee State University > HSCI > HSCI 3000 Week 5 Notes
Nancy Kanarski
GPA 3.97

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September 20-22 Lungs and heart functionality and concepts covered during the presentation of diagrams.
Human Anatomy
Class Notes
Human, anatomy, Lungs, Heart
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This 3 page Class Notes was uploaded by Nancy Kanarski on Thursday September 22, 2016. The Class Notes belongs to HSCI at East Tennessee State University taught by Forsman in Fall 2016. Since its upload, it has received 36 views.


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Date Created: 09/22/16
Human Anatomy September 20­22 LUNGS AIR MOVEMENT/BREATHING  Ventilation: air flow, moving air  Respiration: gas exchange o External respiration: oxygen enters blood, carbon dioxide leaves blood (occurs in  airspace in the lungs) o Internal respiration: oxygen leaves blood and enters the tissues, carbon dioxide enters  blood to be taken out of body PROBLEMS WITH BREATHING  Carbon monoxide poisoning: carbon monoxide will bind to the oxygen site on  hemoglobin and won’t detach, therefore, suffocating the person due to lack of oxygen  moving through the body.   Respiratory Acidosis: occurs in lungs, carbon dioxide increases, increasing acidity and  lowering blood pH  Metabolic Acidosis: occurs in kidneys, carbon dioxide increases, increasing acidity and  lowering blood pH INSIDE LUNGS  Alveolar Type I cells (good for diffusion)  Alveolar Type II cells (make pulmonary surfactant) o Surfactants get rid of surface tension *See diagram of external respiration attached RANDOM  Aortic vagal reflex: when we eat things like bread, our esophagus expands which causes  the trachealis m. in trachea to contract in and pull the cartilage of the trachea closer  together, closing the space and making it hard to breathe.   There are 3,000 miles of capillaries per lung  Artery: blood leaves the heart (pulmonary artery carries deoxygenated blood) HEART OUTSIDE  Pericardium is not elastic  Pericardial cavity = fluid­filled, so as the heart wrings out, the visceral and parietal layers won’t rub on each other too much.   Cardiac tamponade: fluid build­up in the pericardial cavity such that it impedes the  heart’s ability to pump blood RIGHT ATRIUM  Inside of the front wall of the right atrium is very rough: pectinate m.  helps push the  blood down after wringing it  The remainder of the right atrium is smooth for easy and good blood flow  Foramen ovale: a way for blood to bypass the lungs as a fetus  VENTRICLES  Trabeculae carnae: lattice of heart meat, needed to get friction on blood to move it 6,000  miles of capillaries from the right ventricle and 54,000 miles of capillaries from the left  ventricle  Papillary mm: pull on cordae tendineae enough to keep valve from swinging back and  opening into the atrium  Ductus arteriosus: another way to bypass the lungs as a fetus SOUNDS  Cardiac auscultation  nd o Aortic semilunar valve: just right of sternum in 2  intercostal space o Pulmonary semilunar valve: just left of sternum in 2  intercostal space o Right atrioventricular valve: left of sternum in 4  intercostal space th o Left atrioventricular valve: further left in 4  intercostal space BLOOD PRESSURE  Systolic/diastolic: normal = 120/80  o Systolic: pressure of inflating aorta o Diastolic pressure of aorta snapping closed o Pulse pressure: different between systolic and diastolic (want it to be 40 or higher)  If not, aorta has lost its elasticity which could mean there is plaque buildup or that blood is not being delivered to supply the heart muscle CONDUCTION  Heart beats on autorythmicity: in spasms of electrical signals  EKG o P wave: depolarization of atria (contraction) o QRS complex: ventricular contraction o T wave: repolarization of ventricles o PR interval: usually last .15 seconds o ST segment:  Depressed = heart not getting enough oxygen  Elevated = you’ve already had a heart attack o Weird T: atherosclerotic heart (hardened vessels)


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