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The circulatory system connects us - Heart dissection (2022-1) - Contenido educativo

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Subido el 28 de junio de 2022 por Javier C.

16 visualizaciones

With this videotutorial we expect to help you in the dissection of a mammal´s heart.

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Hello, I'm Álvaro, and together with Mario, we have made a dissection of a lamb's heart. 00:00:00
In this video, we are going to show you the materials we have used and the process carried 00:00:06
out. 00:00:10
So, as I have just said, we have used, obviously, a heart, a pair of scissors, a tweezers, a 00:00:11
dissecting board, depositable gloves, a lab coat. 00:00:17
In order to know the orientation of the heart, we can place it sideways so that the curved 00:00:22
part responds to the frontal side, while the plain part to the back side. 00:00:27
In this part, we can observe some fat and the septum, which is divided into the atrial 00:00:34
septum, which is located in the upper part of the heart and separates the atria, and 00:00:38
the ventricular septum, which separates the ventriculi and is located in the down part 00:00:42
of the heart. 00:00:45
We can also find the coronary arteries, which provide blood to the heart, and if they are 00:00:47
blocked, a myocardial infraction is provoked, and we can also observe the myocardium, which 00:00:51
is the muscle that made the heart pump blood, and the apex, which is the down part of the 00:00:57
heart. 00:01:04
Here, we have the right atrium, it is located on top of the right ventricle, and is the 00:01:05
one by which oxygenated blood enters the heart from the lungs. 00:01:10
This is the left atrium, located on top of the left ventricle, and is the one by which 00:01:14
the oxygenated blood is pumped from the heart to the lungs. 00:01:21
So now, we are going to show the pulmonary artery, which reaches the right ventricle 00:01:27
when we introduce the tweezers, as Alvaro is doing. 00:01:32
And here we can observe the aortic arc, which divides the aortic artery into the one that 00:01:49
takes the blood to the brain, and the one that takes the blood to the rest of the body, 00:01:56
such as the arms or the legs. 00:02:02
We know that it is the aortic artery because when my friend Alvaro introduced the tweezers, 00:02:06
they reached the left ventricle, as we can observe now. 00:02:13
As we can see here, there is a part of the atrium that has been removed, and also we 00:02:19
can see the vena cava, which then divides into the superior vena cava and inferior vena 00:02:27
cava. 00:02:33
The superior vena cava goes to the upper part of the body, and here there is the inferior 00:02:34
vena cava, which goes to the inferior part of the body. 00:02:39
We are going to proceed to cut through the right ventricle. 00:02:43
So to do this, we have to introduce the tweezers through the pulmonary artery 00:02:49
and do a parallel cut to the interventricular septum, as it is shown in the video. 00:03:06
Because it is a very long procedure, we are going to speed it up. 00:03:17
So as we can observe here, there are some blood clots inside the heart. 00:03:45
Here you can observe the length of the blood clots compared with the finger of Alvaro. 00:03:59
Here we can observe some tendons in the heart's cavity, and we can also observe the myocardial 00:04:13
muscle. 00:04:17
We can see the thickness of the right ventricle, which is less thick than the left one because 00:04:24
it pumps the blood to the lungs that are located near the heart. 00:04:28
Now we have to perform the same cut, but we have to introduce the tweezers through the 00:04:34
left atrium until we reach the left ventricle, and we have to do a parallel cut to the interventricular 00:04:40
septum. 00:04:47
As you can see in the video, we are going to speed it up. 00:04:48
So now we have already opened the heart, and well, as you can observe, there are some tendons 00:05:18
as in the previous cut, and we can also observe some valves that we cannot identify really 00:05:30
well, but we know that there are some valves that control the blood cycle. 00:05:40
We can also observe that the thickness of the wall of the ventricle is more thicker 00:06:07
than the right ventricle because it has to pump the blood to the rest of the body, so 00:06:13
it needs more pressure for staying in some way to make the blood reach all the parts 00:06:21
that are far from the heart. 00:06:30
So this is the end of our dissection. 00:06:34
We hope that you have enjoyed and that you have learned a little bit more about the heart. 00:06:36
Thank you for giving us this opportunity, and it has been a very interesting dissection 00:06:41
and class project. 00:06:47
Idioma/s:
en
Autor/es:
Álvaro y Mario
Subido por:
Javier C.
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
16
Fecha:
28 de junio de 2022 - 18:02
Visibilidad:
URL
Centro:
IES CALATALIFA
Descripción ampliada:
The first video of the series "global connections" a bilingual team´s project by IES Calatalifa year 2022
Duración:
06′ 48″
Relación de aspecto:
1.78:1
Resolución:
1920x1080 píxeles
Tamaño:
585.59 MBytes

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