[i] Arterial Vessel Phylogeny
Cards (9)
- Chondrichthyes
- 1st pharyngeal slit → spiracle
- Afferent and efferent spiracular artery
- II - VI as connecting loops
- Pretrematic and posttrematic branches
- Actinopterygii
- III - VI AA forms ventral aorta
- 1st pharyngeal slit and 1st AA lost
- Lungfishes
- Separate left and right atria
- Efferent vessel of VI AA → pulmonary artery
- Connected to DA via ductus arteriosus
- Amphibians - I, II AA disappear early
- Urodela
- Larvae
- III - V AA - external gills
- VI AA - pulmonary artery to lung
- Adults
- AA retained as major systemic vessels
- Anura
- Larvae
- III - VI AA - internal gills
- V lost during metamorphosis
- Adults
- III, IV, VI AA → head, body, pulmonary circuits
- III + anterior dorsal aorta → internal carotid
- IV + dorsal aorta
- VI AA not connected to DA
- Ductus arteriosus → pulmocutaneous artery
- Supplies blood and facilitates gas exchange
- Reptilia - III, IV, VI AA, VI AA modified
- 1 pulmonary circuit, 2 systemic circuits
- Pulmonary arch
- Pulmonary trunk + base of VI AA
- Left systemic arch
- Base of left AA, curved part of left DA
- Right systemic arch
- Subclavian arteries
- From DA
- Aves - predominant right systemic arch
- Left systemic arch does not fully develop
- Right systemic arch
- Base of left AA + curved part of left
- Subclavian arteries
- From internal carotids
- Brachiocephalic artery
- From right systemic arch
- Mammals
- Only 3 AA persist
- Carotid, pulmonary, systemic
- Carotids
- from III AA and dorsal and ventral aortae
- Pulmonary
- bases of VI AA and branches
- Left systemic
- Left aortic arch (IV) + left member of DA