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Question 1

Is the tunica intima the same in all vessels? What type of tissue is it? What is its function? Where is its location?

Answer 1

Same yes
location Innermost part
function stops leakage of lumen/ allows for diffusion
tissue Simple squamos epithelium + Areolar connective tissue + Basment membrane

Question 2

Is the tunica media the same in all vessels? What type of tissue is it? What is its function? Where is its location?

Answer 2

Same No, used for classification of vessels
location middle part
function Muscular part to push fluid
tissue muscle tissue

Question 3

Is the tunica externa the same in all vessels? What type of tissue is it? What is its function? Where is its location?

Answer 3

Same Yes
location upper part
function Connect vessel to the rest of the body
tissue areolar connective tissue (bc it connects to the rest of the body)

Question 4

How many layers are capillaries?

Answer 4

Only 1 layer: Tunica intima

Question 5

What is the tunica intima, tunica media, and tunica externa translated for the heart?

Answer 5

Epicardium, myocardium, endocardium (they are the same as the tunicas)

Question 6

What is the structure of the epicardium?

Answer 6

Mesothelium (simple squamous epithelium)+ Basement membrane

Sub-mesothelial Connective tissue: Areolar CT + Adipose tissue

(bc you store fat under)

Question 7

What is the main distinguishing feature of the epicardium under a microscope?

Answer 7

Lumen sitting in adipose tissue

Question 8

What is the location of the mesothelium?

Answer 8

Facing the serous pericardial cavity and it is glued to the myocardium

Question 9

What is another name for the epicardium?

Answer 9

visceral serous pericardium

Question 10

What is the function of the mesothelium?

Answer 10

Produce pericardial serous fluid (bc it is facing it)

phagocytosis

antigen presenting cells

Question 11

What is the structure of endocardium?

Answer 11

Endothelium (simple squamous epithelium) + basement membrane

Sub-endothelial Areolar CT (Collagen and fibroblasts)

Question 12

What is the distinguishing features of the endocardium under a microscope?

Answer 12

Purkinjie fibers and no lumen

(The white circles are adipocytes, but they aren’t as common as in the submesothelium/epicardium)

Question 13

What are the functions of the endocardium?

Answer 13

Slippery, so the blood doesn’t stick

Very thin (thinnest epithelium) so some oxygen can defuse through to reach the myocardium

Blood heart barrier so the blood doesn’t leak outside

Question 14

What is the job of the fibrous skeleton of the heart?

Answer 14

Electric insulation between the atria and ventricles, and provides support to the valves.