Circulatory Flashcards
Thin walled venous chamber
Sinus venosus
Large and thin walled chamber
Atrium
Thick and muscular chamber
Ventricle
Represented by a muscular swelling at base of ventral aorta
Conus arteriosus
Advent of lungfish and amphibian lungs
Double circulation
Shortened ventral aorta
Directs oxygenated blood entering ventricle from left atrium
Spiral valve
Swelling of ventral aorta; smooth muscle
Bulbous arteriosus
Urodele (newts and salamanders)
Partially divided circulation
Sinus venosus empties into right atrium
Pulmonary veins leave left ventricle
A third ventricular chamber shunt between arteries leaving the heart in reptiles
Cavum venosum
Mechanism for breathing and diving in crocodile heart
Lungs not utilized
Blood is not pumped into lungs
Valve between aortic trunks to divert blood
Foramen panizza
4 chambered heart
2 atria
2 ventricle
5th chamber in reptile heart
Sinus venosus
Flap on the side of atrium
Auricle
Major arterial channels
Ventral aorta
Dorsal aorta
6 pairs of aortic arches
Teloest aortic arches
1st and 2nd lost
Dorsal aortae become internal carotids
Lungfish aortic arch
Pulmonary artery from 6th arch
Tetrapods aortic arch
Pulmonary artery from 6th arch
5th arch lost
1st and 2nd arches lost
Dorsal segment dropped between 3rd and 4th arches - Ductus caroticus
3rd arch extends to external carotids
Common carotid at base between 3rd and 4th
Tetrapods 4th arch
Aortic arch
Tetrapods 6th arch
Pulmonary arch
Mammalian aortic arches
3rd, 4th, 5th, and 6th retained embryonically
Adult mammal aortic arch
1st and 2nd dropped
3rd mammalian arch
Carotid arch
4th mammalian arch
Systemic arch
5th and 6th mammalian arch
Lost
Bird aortic arch
Right is retained
Left is lost
Birds vs Mammals arch
Birds have right
Mammals have left
Where all blood returns
Sinus venosus
Drains blood from tail before entering post cardinal
Shark renal portal system
Major venous channels
Cardinals Renal portal Lateral abdominal Vitellines Coronary veins
Directs blood to sinus venosus
Common cardinals
Receive blood from head
Anterior cardinals
Receives blood frim kidneys
Post cardinals
Receives blood from caudal vein
Renal portal
Receive blood from abdominal stream to iliac
Lateral abdominis
Receives blood from intestine into liver
Hepatic portal veins
Direct blood into sinus venosus
Hepatic veins
Vestige of right post cardinal veins
Azygous
Remnant left of post cardinal
Hemiazygous
Post cava
Inferior vena cava
