Arteries’and’Veins’ - USD Biology

[Pages:37]Arteries and Veins

Compara've Structure of Artery and

? Arteries:

Vein Vessel Walls

1.

Tunica Interna

a.

Endothelium

b.

Basement membrane

c.

Internal elas'c lamina

2.

Tunica Media

a.

Smooth muscle

b.

External elas'c lamina

3.

Tunica Externa/adven''a

a.

Connec've 'ssue

Compara0ve Structure of Artery and

? Veins:

Vein Vessel Walls

1.

Tunica Interna

a.

Endothelium

b.

Basement membrane

2.

Tunica Media

a.

Smooth Muscle

3.

Tunica Externa

a.

Connec've Tissue

? Capillary

a.

Endothelium

b.

Basement membrane

cell endo thel ium (one cell thick)

lum en

Classifica'on of Arteries

? Elas'c Arteries

(Conduc'ng arteries)

Aorta, Brachiocephalic, Common Caro'd, Subclavian, Vertebral, Pulmonary, Common Iliac

? Muscular Arteries

(Distribu'ng Arteries)

Brachial artery, Radial artery, Popliteal, Common Hepa'c

Aor'c Arches Fish

--Blood exits the heart into the ventral aorta. --The aor0c arches branch from the ventral aorta as afferent arteries that carry blood to the gills. --The afferent arteries break into a capillary plexus in the gills for gas exchange. The capillaries rejoin as efferent arteries.

--The efferent arteries enter paired dorsal aortae which join posteriorly to form a single dorsal aorta.

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