Fetal Pig Dissection Day 3: Respiratory System

DAY 3:
Day 3 was all about the respiratory system. Locate the lungs, take them out, and rip them apart and do some investigating. 

Front View Of The Lungs

In the fetal pig there are two lungs one on the left and one on the right side of the fetal pigs body. The right lung has 3 lobes and the left side has 2 lobes. Each lung has a Brochus stem that breaks off in to Bronchioles and on the end of each Bronchioles are stretch receptors called Alveoli. Each Alveous has a capillary network in it in order to have diffusion between O2 and CO2 to oxygenate the blood in the lungs and take it back to the heart. 

Here Are Some Pictures Of The Bronchioles.

I've added some pictures of the bronchioles in side one of the lungs that we cut open so you can get a good sense of what they look like.

 

 Back View Of The Heart

You have your Esophagus and your Trachea and when you eat you don't want food to go down your Trachea and in to your lungs so in order to stop that from happening you have Epiglottis which when you eat blocks off your Trachea. The Trachea has cartilage rings in order for it to stay open where as your Esophagus in smooth muscle and is collapsed, food moves down by peristalsis.

    

Since the lungs are the site of oxygenation of the blood there are lost of veins and arteries that are linked to the lungs. The Pulmonary veins take the oxygenated blood that comes from the lungs and sends it out to the body tissues and organs, and the pulmonary arteries take the deoxygenated blood from the heart to the lungs to become oxygenated.

     

 

 

 

 

 

Works Sited

http://www.mhhe.com/biosci/ap/dynamichuman2/content/respiratory/visuals.mhtml    
  http://www.google.ca/imgres?imgurl=http://www.infomat.net/1/staffroom/worksheets/science/11_14/Nutrition/heart.gif&imgrefurl=http://www.infomat.net/1/staffroom/worksheets/science/11_14/Nutrition/nutrition_pt4answers.htm&usg=__kgVXjZagyQcQMnm6Wiup7XVjVrU=&h=406&w=440&sz=43&hl=en&start=0&sig2=PW4gJlO2GFKoKi1hJIP81g&zoom=1&tbnid=dvpuylfU3iaQwM:&tbnh=145&tbnw=155&ei=OeDyTfmLMI2CsQPaspiRDQ&prev=/search%3Fq%3Dpulmonary%2Barteries%2Band%2Bveins%26um%3D1%26hl%3Den%26sa%3DN%26biw%3D1366%26bih%3D616%26tbm%3Disch&um=1&itbs=1&iact=rc&dur=398&page=1&ndsp=21&ved=1t:429,r:6,s:0&tx=41&ty=84&biw=1366&bih=616