Flashcards in Cardiovascular Lecture Deck (49):
Parts of closed circulation of blood
Artery-Transport blood away from heart
Vein-Return blood to the heart
T/F Lymph system is two-way drainage system
T/F Systemic circulation circulates to and from everywhere on the body
Everywhere but lungs and abdominal viscera
What is the circulation to and from the lungs?
What is the circulation from abdominal viscera?
What's the general structure of blood vessels?
Classification and name of tunica intima
Simple squamous epithelium
What does tunica intima incorporate?
Subendothelial layer with internal elastic lamina
describe the endothelial cells of tunica intima
Smooth surface lining cells
Secretes enzymes and collagens
Controlling vascular tune by secreting endothelial-dependent relaxing factor, nitric oxide (NO) and endothelial dependent constriction factor, endothelin 1 (ET-1)
What does tunica media incorporate?
Smooth muscle cells
Elastic fibers and lamina
CT (external elastic lamina)
What does tunica adventitia incorporate?
Complete 3 layers in arteries
Prominent muscle layer (media)
Types of arteries
Elastic arteries (conducting)
Muscular arteries (distributing)
Elastic artery (conducting) layers
Intimia= Thin, cincomplete internal elastic lamina
Media=More than 40 layers of elastic membranes and smooth muscle
Adventitia=Thin external elastic lamina
Visa vasorum: small blood vessels in big vessel wall goes up to tunica media
Muscular artery (distributing) layers
Intima= Apparent internal elastic lamina
Media=Up to 40 layers of smooth muscle cells
Adventitia=Apparent external elastic lamina
What do arterioles lack?
How many layers of smooth muscle (tunica media) in arterioles?
T/F Arterioles have thick layer of adventitia
Terminal arterioles vs metarterioles
Terminal arterioles have one complete layer of smooth muscle cells
Metarterioles that supply blood to capillary beds have in-complete layer of smooth muscle cells and have sphincter-like smooth muscle cells
What is the vascular bed between arterioles and venules?
T/F Capillary has single layer of endothelial cells and basal lamina
What type of cells surround capillaries and venules and helps with contraction and differentiation
Different types of capillary
Continuous=complete layer of endothelial cells and basal lamina
Fenestrated= complete layer of endothelial cells and basal lamina; pores with diaphragm
Sinusoidal=discontinuous endothelial cells and basal lamina; big pores without diaphragm
Opening of arterio-venous anastomoses (AV shunt) allows
Blood flow bypassing capillary bed. RIchly innervated/
If shunt is closed, blood has to go through capillary bed
T/F Veins are vessels with small lumen and thick walls
Large lumen and thin walls
What are the three layers of veins
Thin tunica media
What are the pairs of venous valves made of and what are there purpose?
Prevent backflow of blood
T/F Veins have layer of smooth muscle
What are structures of heat wall
Name of endocardium
Sub-endocardial layer containing small vessels, nerve fibers, PKJ fibers.
Name of epicardium (and pericardium)
What is the cardiac skeleton made of
What are some gross anatomy structures we should be familiar with (but don't need to ID)
Annuli fibrosi; aorta, pulmonary artery, AV orficies
Trigonum fibrosum; aortic valve
Inter-ventricular septum (septum membranaceum)
Lymph system vs vein walls
Similar but lymp walls are thinner
Lymph system vs vein lumen
Lumen is bigger and may see WBC
Aortic arch branches into (2)
Common carotid a
Internal carotid a
Right aortic a branches (1)
R subclavian a
L aortic arch branches (1)
Aortic arch (adult aorta)
The aortic arch continues as...
Pulmonary trunk following partitioning of truncus arteriosus
R aortic arch branches
R pulmonary a
L aortic arch branches
Ductus arteriosus (and L pulmonary a)
Left umbilical v=
Ligamentum teres (round ligament of liver)
Round ligament of urinary bladder
What is the purpose of the placenta
Provides O2, nutrition, and waste removal
T/F Pulmonary circulation is required before birth
Not until birth
-->Bypass via foramen ovale and ductus arteiosus