The Circulation and Internal Structures of the Heart

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From the course by The University of Edinburgh

EDIVET: Do you have what it takes to be a veterinarian?

657 ratings

The University of Edinburgh

EDIVET: Do you have what it takes to be a veterinarian?

657 ratings

This course is for anyone interested in learning more about Veterinary Medicine, giving a “taster” of courses covered in the first year of a veterinary degree and an idea of what it is like to study Veterinary Medicine.

From the lesson

An Introduction to Body Systems Anatomy

In this week, we will look at the anatomy of the body, and the teaching team to guide you through this part of the course are Professor Susan Rhind and Dr Gurå Therese Bergkvist. We recommend that you start with the overview reading under the week 2 overview. For this week we have split the core materials into four sections that we suggest you work through in the order presented.

The Anatomy of the Heart LHS2:39

The Anatomy of the Heart RHS2:23

The Anatomy of the Lungs2:24

The Circulation and Internal Structures of the Heart5:17

Gross Heart Anatomy6:52

Topographical Heart Anatomy1:50

Meet the Instructors

Dr Jessie Paterson
BSc (Hons) Agricultural Chemistry, PhD, PgDip
Lecturer in Student Learning
Kay Aitchison
BSc Agriculture (Hons Animal Production Science)
Lecturer in Farm Animal Husbandry
Prof Susan Rhind
BVMS, PhD, FRCPath, PFHEA, MRCVS
Professor of Veterinary Medical Education
Dr Gurå Therese Bergkvist
BSc Hons (Vet Sci), BVM&S, PhD, MRCVS
Lecturer, Preclinical Veterinary Sciences
Rachel Whittington
BVSC MRCVS
Lecturer in Professional Skills
Dr Catriona Bell
BVetMed, PhD, PGCAP, MRCVS
Senior Lecturer in Veterinary Education
Dr Andrew Gardiner
BVM&S, Cert SAS, MSc, PhD, MRCVS
Veterinary Clinical Senior Lecturer

So to finish up we'll have a little look at the schematic diagram of the heart and

talk our way through the internal structures of the heart, and

also the flow of blood through the heart,

and how it comes from the body through the lungs and then back to the body.

So we'll start off by right and left sides.

And if you start thinking, so deoxygenated blood comes back from the body,

it comes into the right side of the heart in this [INAUDIBLE] structures

you got cranial so from the head and the neck and that area you have your cranial.

Vena cava feeding back in.

That's your cranial vena cava.

And then that caudal vena cava, so that comes from the caudal part of the body,

so it will come form the abdomen and the hind limbs and

all of that blood leads right into the caudal vena cava.

And those two large veins feed into the right atrium.

The right atrium is the first chamber of the heart that they come to.

So that's the right atrium there.

So when it leaves the right atrium, it will go through a little valve here,

so this is the right, A.V. valve.

A.V. stands for atrial ventricular valve,

which is between A2 on the ventricle.

So that's the valve there.

So that brings the blood into this chamber,

which will be your right ventricle.

So to leave the right ventricle, it will go through another valve.

And we'll label that over here and this will be the pulmonary valve.

The pulmonary valve is one of the valves we call the semilunar valve and

we'll see that when we look at the actual through the blood.

It's pulmonary valve and this vessel here which is called the pulmonary trunk,

and we saw that on the right side of the heart.

On the trunk.

On the trunk then divides into two vessels and

that is the left pulmonary artery.

And there's this one.

And we have a right pulmonary actually.

And these two actually supply the left and the right lungs.

And all the deoxygenated blood.

I'm ready to pick up this oxygen.

So this is going to the lungs.

So the blood then is actually being

oxygenated in the lungs and is sneaking back into the left side of the heart.

And there are several pulmonary veins coming back from the lungs all that.

Blood as it goes back to the heart,

so that would be pulmonary vein.

And that leads into the left atrium.

And so remember the left atrium lies close to the base of the heart and

the cords are a lot [INAUDIBLE] when we look from the right side.

There's your left AV valve, so that the valve

opens and lets the blood in from the left atrium into the left ventricle.

And this is the power house then that's going to

pump this blood all the way around the body again.

So to leave the left ventricle it has to go

through this valve, and that is your aortic valve.

And that's the second cellular value that we've got.

And the blood then goes all the way out here in this major vessel,

which is the aorta, and that's where oxygen begins.

And that's a quick view of how blood moves around the heart.

And it's oxygenated in the lung and then returned to the body.

And so we'll have a look at the real thing in the next video.

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