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Ch. 23
Blood Vessels
17
Anatomy
Undergraduate 2
11/13/2013

Additional Anatomy Flashcards

 


 

Cards

Term

 

 

 

 

Structure of blood vessels

Definition

 

 

lumen (inside space); 1-3 layers in wall

Term

 

 

 

 

Tunica externa

Definition

 

 

 

areolar connective tissue w/ elastic fibers

Term

 

 

 

 

tunica media

Definition

 

 

 

circular layers of smooth muscle tissue

Term

 

 

 

 

tunica intima (interna)

Definition

 

 

 

 

simple squamous layer w/ think areolar layer

Term

 

 

 

Types of blood vessels

Definition

 

 

arteries; capillaries; veins

Term

 

 

 

Arteries

Definition

 

 

carry blood away from heart; usually oxygenated blood (except pulmonary arteries)

Term

 

 

 

 

elastic arteries

Definition

 

 

 

largest arteries and have elastic tissues throughout but especially around t. media

Term

 

 

 

muscular arteries

Definition

 

 

 

 

medium size arteries and have a larger smooth muscle layer; carry blood to the organs and tissues

Term

 

 

 

 

smallest arteries

Definition

 

 

 

 

arterioles

Term

 

 

 

 

Capillaries

Definition

 

 

 

smalles blood vessels; t. intima only; one squamous cell thick; nutrients/wastes exchanged b/t blood and tissue fluid; 40 billion capillaries arranged in beds; flow controlled by precapillary sphincter muscles

Term

 

 

 

 

Continuous capillaries

Definition

 

 

most common, form continous lining connected by tight junctions

Term

 

 

 

 

fenestrated capillaries

Definition

 

 

 

have holes in them are located where fluid is transported b/t blood and interstitial tissues

Term

 

 

 

 

sinusoidal capillaries

Definition

 

 

 

wide and larger vessels allowing transport of larger materials such as proteins or cells (bone marrow, anterior pituitary gland, spleen, liver)

Term

 

 

 

Veins

Definition

 

 

 

carries blood towards heart; usually deoxgenated blood; vein walls are relatively think; veins hold 60% of body's blood supply at rest; all three tunicas; very low blood pressure

Term

 

 

 

 

Pulmonary circulation

Definition

 

 

 

 

right side to lungs and back

Term

 

 

 

 

systemic circulation

Definition

 

 

 

left side to body and back

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