HEART & LUNG DISSECTION.HEART & LUNG DISSECTION.HEART & LUNG DISSECTION.HEART & LUNG DISSECTION.

APPARATUS

; A pig´s heart, (Sus scofra)

; A dissection board,

; Dissecting tools – scalpel, scissors, and forceps

STEPS:

1st part: Respiratory system

IdenIdenIdenIdenttttifyifyifyify:

� Oesophagus (it is not respiratory system) - muscular tube. � Trachea , dissect a piece to see the C-shaped cartilaginous rings. � Epiglotis. � Pleural membrane. � Lungs lobes.

Dissect the lungs to showshowshowshow:

� Bronchus and bronchioles

Now let´s dissect the heart:

2nd part: Heart

IdentifyIdentifyIdentifyIdentify:

� The coronary arteries.coronary arteries.coronary arteries.coronary arteries. � The 4 chambers4 chambers4 chambers4 chambers: atria + ventricles

(atria look like ears)

DifferenceDifferenceDifferenceDifference between

� Left and right ventriclesLeft and right ventriclesLeft and right ventriclesLeft and right ventricles

(the left one looks bigger, and has thicker wall) � Arteries and Veins:Arteries and Veins:Arteries and Veins:Arteries and Veins:

(arteries have thicker walls)

Try to identifyidentifyidentifyidentify

� The different vesselvesselvesselvesselssss.

By inserting your finger through it, according to the chamber you get, you can know which vessels it is.

Finally: cut the heart and identifyidentifyidentifyidentify:

� The different valvesvalvesvalvesvalves of the heart. Illustrations from Gray´s Anatomy