Comparative Vertebrate Anatomy

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Aortic Arch Basic Pattern

Six pairs of aortic arches connect paired dorsal aortae to ventral aorta
Fish Aortic arches

Interrupted by capillary beds of gills
Aortic Arch pattern in Chondricthyes and Teleostes
- First pair is lost
- Remaining 5 pairs are interruped by cap beds
- Afferent and efferent branchials for on either side of cap beds from original aortic arches
- Arteries off efferent aortic arches:
- Hypobranchials
- External carotids are cranial extensions of Ventral aortae
Aortic Arch patternn in Amphibians and Reptiles
- Loss of 1, 2 and 5 Pairs
- Loss of Capilliary beds (cause no Gills)
- Arch Pair VI (6)-forms pulmonary arteries (cause they have lungs now)
- Ductus Arteriosus connectes 6th arch to dorsal aorta.
- Arch pair IV (4)-forms systemic arches
- Arch pair III (3)-associated with carotid system
- Ductus caroticus= remain of dorsal aortae between 3rd and 4th arch
Aortic Arch patters in Mammals:
- Similar to Birds
- Left 4th aortic arch is retained as systemic arch (=arotic arch)
- Right 4th aortic arch is mostly lost
- Birds- Right is kept, Left is mostly lost
- Patent (open) Ductus venosus is retained by fetus!
BASIC VENOUS IN PRIMITAVIE VERTEBRATES AND EMBRYOS OF HIGHER VERTEBRATES
- Paired Symmetrical veins
- Hepatic Portal System
- Renal Portal System
PAIRED SYMMETRICAL VEINS in primiative vertebrates and embryos
- JVAP
- Jugulars
- Vitelline Veins
- Anterior Cardinals
- Posterior Cardinals
HEPATIC PORTAL SYSTEM in primiative vertebrates and embryos
- Right viteline=hepatic portal vein
- Proximal vitelline viens=hepatic veins
- Definition of portal: A system of veins that carries blood TOWARDS the heart but ends of a capillary bed in an organ other than the heart
RENAL PORTAL SYSTEM in the venous systen in primitive vertebrate and embryos
- Not in Mammals
- Proximal ends of posterior cardinals degenerate
- Distal end is posterior cardinals carry blood to Kidneys= renal portal vein

Author

brittwayb

121117

Card Set

Comparative Vertebrate Anatomy

Description

Comparative Vertebrate Anatomy- Aortic Arches

Updated

2011-12-06T05:38:35Z

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