1. Enterobius
2. Echis
3. Echinus
4. Echineis
Echinus
1. Hydra
2. Ocotpus
3. Nereis
4. Ophiothrix
Ophiothrix
1. Sphyrna
2. Hippocampus
3. Cynoglossus
4. Eheneis
Sphyrna
1. Neoceratodus
2. Hippocampus
3. Torpedo
4. Echeneis
Echeneis
1. Pelvic girdle
2. Pectoral girdle
3. Skull
4. Vertebral column
Pectoral girdle
1. Lingual vein and manfibular vein
2. Subscapular vein and internal jugular vien
3. Brachial vein and musculocutaneous vein
4. External jugular vein and subclavian vein
Subscapular vein and internal jugular vien
1. Wrist
2. Pectoral girdle
3. Ankle
4. Pelvic girdle
Ankle
1. Pterygoid
2. Squamosal
3. Palatine
4. Premaxilla
Palatine
1. Optic nerve
2. Occulomotor nerve
3. Pathetic nerve
4. Abducens nerve
Abducens nerve
1. Dense connective tissue
2. Loose fibrous connective tissue
3. Fasiculi
4. Stratified epithelium
Loose fibrous connective tissue