#1: Heart: Function, Location, Coverings, and Layers

discuss difference between arteries and veins

arteries carry oxygenated blood away from the heart whereas veins carry deoxygenated blood to the heart

the right side of the heart is considered ___ ___ whereas the left side of the heart is considered ___ ___

pulmonary circuit

systemic circuit

the covering of the heart is the ___ and has two types ___ and ___

pericardium

fibrous, serous

fibrous pericardium function

protect the heart with thick connective tissue layer

serous pericardium is split into two layers, name them

parietal layer and visceral layer

parietal layer contains

parietal pericardium, outside layer

visceral layer contains

visceral pericardium, inside layer, covering heart and great vessels, epicardium

serous pericardium function

produces serous fluid that lubricates the heart and reduces friction for heart beats

three layers of the heart wall

epicardium

myocardium

endocardium

function of each layer of heart wall

epicardium provides protection and contains heart’s blood vessels

myocardium is the muscle, thick, and repsonsible for contraction and relaxation of the heart

endocardium lines the chambers of the heart and surface of valves

what is special about the ventricular myocardium

it is spiral and circular to allow prevention against fatigue when contracting and relaxing for so long

describe the function and location of papillary muscles and chordae tendonae

papillary muscles connect ventricular wall to tricuspid and bicuspid valve causing the valves to open and close

chordae tendonae connect papillary muscles to valve leaflet