anatomy of heart (W2, NT)

Fibrous pericardium

outer layer of pericardial sac

Serous pericardium

inner layer of pericardial sac

Epicardium

outer most layer of the heart

Pericardial cavity

separates epicardium and serous pericardium (separates outer layer from inner layer of pericardial sac)

Myocardium

middle muscular layer

Endocardium

layers that lines the heart

Coronary sulcus

separates atria and ventricles

Interventricular sulci

separate ventricles

Superior Vena Cava

Receives deoxygenated blood from the upper body (up to diaphragm) (left)

Inferior Vena Cava

Receives deoxygenated blood from the lower body(left)

Coronary Sinus

collects deoxygenated blood from heart muscle and delivers to the right atrium (left)

Systemic system Direction

Pumps blood to the rest of the body (Left side heart)

Pulmonary system Direction

Pumps blood to the lungs (Right side heart)

Systemic system

-Superior Vena Cava

-Inferior Vena Cava

-Coronary Sinus

Pulmonary system

-Pulmonary Trunk

-Pulmonary veins

-Ascending aorta

Superior Vena Cava

receives deoxygenated blood from upper body (up to diaphragm) (Systemic system)

Inferior Vena Cava

receives deoxygenated blood from lower body (Systemic system)

Coronary Sinus

collects deoxygenated blood heart muscle and delivers to the right atrium

(right side pumps to lungs)(Systemic system)

Pulmonary Trunk

right and left artery

carries deoxygenated blood to lungs

Pulmonary veins

(four) return oxygenated blood to heart

Ascending aorta

oxygenated blood out to body

largest blood vessel in the body

Tricuspid Valve

3 cups

between right atrium and right ventricle

Bicudpid

2 cups

between left atrium and left ventricle

Chordae tendineae

cups are attached to ventricles with this

-thread like bands of fibrous tissue (muscular braces)

Pulmonary valve

Between pulmonary trunk and right ventricle

Aortic vales

between aorta and left ventricle

Sinoatrial node

pacemaker, initiates impluse

Atrioventricular (AV) node sends impulse to AV bundle

sends impulse to AV bundle (part of the heart kinda in sternum)

Bundle of HIs

sends impulses to both sides of system connecting atra and ventricle

Purkinjes fibers

sends impulse to myocardial cells (connecting the cells)

Systole

contraction phase

Diastole

relaxation phase

Pulmonary Circulatory

blood flow to lungs for gas exchange (dropping off CO2 picking up O2)

Cerebral Circulatory

route to the brain

Fetal Circulatory

between developing fetus and mother (happens thought placenta)

Pulmonary artery

carries deoxygenated blood to the heart then lungs

(arteries usually carry oxygenated blood)

Pulmonary vein

blood vessels that carry freshly oxygenated blood from the lungs back to the left atrium of the heart

(veins primarily carry deoxygenated)

Arteries

thiker and stonger than veins (transport away from heart (arteries usually carry oxygenated blood)

Arterioles

smaller than arteries they are attached to capillaries

Capillaries

Site of gas, nutrince and waste exchange

Small RBC to follow single file though them

Venules

Connect to capillaries (small veins)

Veins

Less elastic than arteries

(veins primarily carry deoxygenated)