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CMU / Science / HSC 214 / It is a buildup of plaque that causes a heart attack. what is it?

It is a buildup of plaque that causes a heart attack. what is it?

It is a buildup of plaque that causes a heart attack. what is it?

Description

School: Central Michigan University
Department: Science
Course: Human Anatomy
Professor: Brittany luckett
Term: Spring 2018
Tags: HSC
Cost: 25
Name: Human Anatomy Week 7 Notes
Description: These notes cover fetal heart pathways and the structure of our hearts and vessels
Uploaded: 02/25/2018
4 Pages 48 Views 3 Unlocks
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∙ The cardiac veins all drain into the coronary sinus, a large vein that lies in the posterior coronary sulcus


It is a buildup of plaque that causes a heart attack. what is it?



∙ The right coronary artery branches into the right marginal artery, which  supplies the right border of the heart, and the posterior interventricular  artery, which supplies the posterior surface of both ventricles

∙ Cardiac muscle tissue= under voluntary control, contains intercalated discs  between branching muscle fibers, and has incredible stamina and resistance  to fatigue

Ascending aorta 


What is anastomosis?



If you want to learn more check out What is a measure of how far a reaction proceeds until it reaches chemical equilibrium and there is no further product concentration increase?

Right coronary artery left coronary artery 

circumflexa 


What is a pacemaker of the heart?



If you want to learn more check out What are the three most common stis (in the us) caused by bacteria?

 Anterior interventricular Right marginal artery posterior interventricular 

∙ The atria contract first then the ventricles  

∙ The heartbeat is controlled by the sinoatrial node which is located on in the  posterior wall of the right atrium Don't forget about the age old question of What is metamemory?

∙ Leading cause of death in the united states is heart disease

∙ Complete blockage of an artery or vessel causes for a complete coronary  bypass

Ischemia= buildup of plaque that causes a heart attack  

∙ In an artery the lumen is relatively smaller than that of a corresponding vein

A= tunica interna

B= tunica media

C= tunica externa Don't forget about the age old question of What are the four beliefs of qadar?

∙ Systemic veins hold the majority of the blood at rest

∙ Pulmonary veins carry oxygenated blood from the lungs to the left atrium

∙ The ductus arteriosus is a fetal structure that shunts blood from the  pulmonary trunk to the aorta -> the blood bypasses the lungs because the  lungs are not yet fully developed yet

∙ After birth the umbilical artery becomes the medial umbilical ligament  (umbilical cord becomes closed off)

∙ After birth, if blood is allowed to flow from the left atrium to the right atrium,  the foramen ovale did not close (this is located between the right and left  atrium and allows blood to bypass the lungs and once you take your first  breath this flap closes. if it does not then they can go in and shut it)  

∙ Right side of the heart is low pressure and the left side is high pressure

∙ Fetal structure = umbilical vein

Postnatal structure= ligamentum teres

Anastomosis= site where two or more arteries or veins converge to supply the same body region

- Allows for blood to come from another portion of the body to help come in  and aid in damaged tissueWe also discuss several other topics like What is a graph that describes the maximum amount of one good produced for every possible level of production of the other good?

Varicose veins= valves in the vessels are damaged or are not working properly and  blood begins to pool near surface -> if it not circulating it can coagulate and form  blood clots

Thrombosis= deep blood clot

Pulmonary embolism= blood clot that has traveled to the heart and is lodged inside  the lungs

∙ The AV bundle receives the muscle impulses from the AV node and extends  into the interventricular septum before dividing into left and right bundles We also discuss several other topics like Who is jamal al-afghani?

∙ The AV node is located in the floor of the right atrium between the right AV  valve and the opening for the coronary sinus

∙ Purkinje cells being within the apex of the heart and extend through the walls of the ventricles

∙ Purkinje fibers = conduction fibers

∙ Sympathetic innervation increases the heart rate

- This can occur during exercise or the fight or flight response

∙ Parasympathetic innervation decreases the heart rate 

Cardiac  

plexus

∙ The right coronary artery typically branches into the right marginal artery,  which supplies the right border of the heart, and the posterior interventricular artery, which supplies the posterior surface of the left and right ventricles  

∙ SA node= pacemaker of the heart

SA node -> internodal pathways -> atrioventricular node -> atrioventricular bundle  -> L/R bundle branches -> Purkinje fibers

∙ The innervation by the autonomic centers in the brainstem does not initiate a heartbeat but it can increase or decrease the rate of the heartbeat

∙ There are more mitochondria in cardiac muscle and a less extensive  distribution and association of t-tubules with SER compared to skeletal  muscle

Lumen= the space within a vessel through which blood flows through

Continuous capillaries= use simple diffusion or pinocytosis to pass materials  through the vessel walls

Venules= smallest veins

Sinusoids= capillary that has a large gap in its walls and has a discontinuous or  absent basement membrane; found bone marrow, the spleen, and the liver; allows  for the transport of larger particles such as proteins or cells

Fenestrated capillaries= have pores that permit small molecules to move out of the  vessels

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