Histology (images)

Question 1

What type of cell is seen here?

Answer 1

purkinje fiber

Question 2

what kind of muscle is seen here?

what distinctive feature is seen?

what molecular structure facilitates communication between cells (aka efficient electrical signal transmission)?

Answer 2

cardiac muscle

intercalated discs

gap junctions

Question 3

what type of cells are seen here?

Answer 3

purkinje fibers

Question 4

what structure is seen here? Jusitfy your answer.

What is the main tissue type of the structure?

Answer 4

valve. It is anchored to cardiac muscle tissue that is darker staining.

the valve is made of dense connective tissue usually found in the cardiac skeleton

Question 5

Name the 5 visible orifices left to right, top to bottom:

Answer 5

left atrium, pulmonary artery, aorta, left ventricle, right ventricle

Question 6

what two layers are visible in the vessel? (the lumen is at the base of this picture)

what are the darkest staining lines?

If the top visible layer is the largest in this vessel, is it an artery or a vein?

Answer 6

• media at the top, intima at the bottom (with line of simple squamous endothelium at the bottom)
• the dark staining lines are the elastic membranes
• if the media is the largest, this is an elastic artery

Question 7

Is this an artery or a vein? What is the prominent feature?

Answer 7

This is a vein because the adventitia is largest (dark intima, lighter media, longitudinal cross section of smooth muscle in adventitia)

Question 8

What vessels are depicted here? How can you tell?

Answer 8

Vein to left, artery to right. Usually beside each other. Vein is irregular, artery is a circle.

Question 9

what structure is depicted here?

Answer 9

a valve

Question 10

What type of capillary is depicted here?

Answer 10

A discontinuous capillary (or sinusoid)

Question 11

What two vessels are depicted here?

Answer 11

artery with more smooth muscle to left, vein to right.

Question 12

Answer 12

aorta

large, elastic artery

Question 13

Answer 13

verhoff stain of aorta

Question 14

name 2 vessels

Answer 14

vein

artery

Question 15

Answer 15

vena cava

large vein

extremely thick tunica adventitia

Question 16

Answer 16

Normal aortic valve with three thin, delicate leaflets, empty sinuses of Valsalva and tight approximation of the
leaflets in the closed position

Question 17

Answer 17

Mitral Valve (gross photographs). Fig. 1 is viewed from above from the atrium.