Lung Dissection Lab Report

The purpose of the lung dissection Is to see the physiology of the lungs and how the lungs and heart work together. The goal of the lab was to fully understand the Anatomy & Physiology of the lungs with the parts that were outside of the organ of the lungs; The question of the lab was “How to do the lungs function and how do they get air to the blood.

The steps of the dissection that were taken, the first step was taking the heart apart from the lungs and detach the tubing from the heart to the lungs. Like taking the Aorta and testing the elasticity by cutting it and pulling it like a rubber band. The start was the dissection was with the heart of the Respiratory system by cutting the pulmonary truck (which brings blood to the lungs to give the blood Oxygen) also the Aorta (brings blood all over the body). Then started to observe the lungs by cutting the trachea open and see the openings that give air to the lungs. Like cutting the trachea to see the primary bronchi. The Group in the lab deviated in the lab by cutting the left lung open to see the Secondary Bronchi because the tubing of the air pup was bigger in diameter than the Secondary Bronchi and cut a trachea cartilage ring at the end of the lab and not when we were told to in the lab directions.

The findings of the trachea’s cartilage rings were that the wall’s thickness was ½ cm for the capability of supporting itself for difference of breath (difference of pressure).

The walls were sturdy from being moved from side to side, but it was moveable from pulling it upwards. The rings of the trachea help the trachea from collapsing inwards from the thickness of the rings (1/2 Cm) and being on every centimeter of the

trachea.

In the Finding of the Bronchi’s, there is a difference in the size of the left and right bronchus. The left bronchus was 1 ½ centimeters in diameter and thickness of the walls were 1/10 centimeter; the size can be compared to the number of lubes in the lung (2 for the left lung). Because the right lung has a diameter of 2 centimeters and 1/10 wall thickness with 3 lubes. The Bronchi have the job of bringing air to the lungs and pushing them to the secondary bronchi’s.

The Diaphragm’s findings were that it has a thickness of the muscle was 3 centimeters. The role of the diaphragm is when under inspiration, under contraction, they help volume of the Respiratory System increases and the air is drawn into the lungs.

The heart supplies the lungs with blood from the pulmonary trunk to the pulmonary veins which will be oxygenation the blood by the Alveoli in the lungs. The heart and lungs are connected by the pulmonary veins.

In the lab, a step stated that the lungs needed to be filled with air, so it would full up the lungs. When the lung was filled to its full capacity and that is called the vital capacity. And when the removal of the pup from the primary bronchi there was still a small amount of air which is called residual capacity.