Circulatory System

Week 7.1

Heart

What organ is being shown

Sagittal section

What is the section of the cut of this histologic slide?

Wall of left ventricle

What is being shown

Epicardium

What is the label of the **pink**

Myocardium

What is the label of the **blue rectangle**

Endocardium

Label of Yellow rectangle

Wall of the canine right ventricle

What is being shown

Epicardium

What is 1.

Endocardium

What is 2.

Epicardium

Pink

Myocardium

White

Cardiac muscle cells

Gray

Mesothelium

The outside of this is lined with

Myocardium

Black

Endocardium

Red

Cardiac muscle cells

Yellow

Myocardium

It is the bulk of the ventricular wall and is composed of cardiac muscle (Black)

Cardiac muscle cells

The myocardium is composed of

Endothelium

The **Endocardium** is lined with this on the **inside**

Subendothelial layer

The pale staining connective tissue layer beneath the endothelium

Ventricular wall

What part of the heart is this ?

Ovine

Which animal is this histologic slide taken from

endocardium

White

Endocardium

Bundles of Purkinje fibers are located beneath the ____

Purkinje fibers

Black

Cross section

What is the section of the cut of this histologic slide?

Purkinje fibers

This is a special type of cardiac muscle fibers that comprise the atrioventricular bundle (of His). They have a larger diameter than ordinary cardiac muscle fibers; They function in impulse conduction.

Purkinje fibers, 200x

What is being shown? What is its magnification?

Nucleus

Blue

Myofibrils

Violet

Ovine

What animal is this tissue from

centrally-located

Nucleus of Purkinje fibers are

periphery

location of myofibrils in a purkinje fiber

Cross section

Section of cut of this histologic slide

Canine

What animal is this slide from

6x

Magnification

Aorta

What is tissue is this

Canine

What animal is this slide from

Tunica intima

Blue

Tunica media

Brown

Tunica adventitia

Yellow

Canine aorta

What is being shown

20x

Magnification of this slide

Vasa vasorum

Small blood vessel that supply blood to the outer wall of the bigger blood vessels

Tunica intima

Black

Tunica media

White

Tunica adventitia

Red

Vaso vasorum

Orange

Wall of Canine Aorta

What is being shown?

Subendothelial connective tissue layer

The tunica intima of aorta is lined by endothelium (simple squamous epithelium) underneath which is (GREEN)

RBC

Red

endothelium

Black

Tunica media

Blue

Tunica intima and Tunica media of Aorta

What is being shown

Tunica media of Aorta 200x

What is being shown

elastic fibers

Black

Smooth Muscle Cells

Yellow

Elastic Fibers

Refractile wavy lines between the smooth muscle cells

Collagen & Elastic Fibers

The tunica adventitia is composed of connective tissue elements. The connective tissue fibers are primarily

External elastic lamina

This can be seen between Tunica Media and Tunica Adventitia (Yellow)

Tunica Media

Brown

Tunica Adventitia

Red

Wall of Canine Aorta, elastic fiber stain

What is being shown

Orcein

What is the stain being used in this slide

Elastic fibers

Large arteries, e.g., aorta, are characterized by the abundance of this black wavy lines in their wall; thus, they are also called elastic arteries

auxiliary pump

The elastic fibers help the arteries withstand the great force of blood pumped by the heart; they also act as an (via elastic recoil)

Common Carotid Artery

What is being shown

Cross Section

What is the cut of this slide dude pare chong bro

Common Carotid Artery

Red

Vagosympathetic nerve

Blue

Wall of Common Carotid Artery, 50x & 200x

ano e2 w/ magnification

Tunica Media

Yellow

Tunica Intima

Pink

Tunica Adventitia

Green

Internal elastic lamina

Black

Wall of common carotid artery. 200X

ano e2 + magnification

elastic fibers

White

smooth muscle

Red

External elastic lamina

Yellow

Tunica adventitia

Blue

Common carotid artery, elastic fiber stain

ano e2

Cross section of Brachial artery, 50x, Canine

ano e2 + magnification + specie

Hematoxylin-eosin (HE)

Stain used

Tunica intima, Tunica media, Tunica Adventitia

Yellow, Green, Blue

Wall of Brachial artery, 200x

ano e2 + magnification

Internal Elastic Lamina, Endothelium

Pink, Brown

Elastic Fibers & Smooth muscle

Orange & Red (B)

T. adventitia, External elastic Lamina, Smooth muscle

Blue, Yellow, Red (C)

Brachial artery, elastic fiber stain, Cross section

ano e2 + anong kind of cut is this dude parechong bro

Brachial artery, internal elastic lamina

Black, White

Orcein

What kind of stain was used in this

Canine digital artery (Muscular artery), 20x 50x

ano e2 + magnification

Tunica adventita, Tunica media, tunica intima

white, gray, black

Wall of Muscular Artery, 200x

ano e2 + magnification

Smooth Muscle Nuclei, Internal elastic lamina

Black, White

Tunica adventitia & Tunica media, Internal elastic lamina

White, Black, Gray

Longitudinal section of equine vena cava

Anatomical cut + Specie + Organ

Lumen, T. intima/media, T. adventitia

White, Pink, Violet

Vaso vasorum, T. intima/media, T. adventitia

Blue, Red, Yellow