Studying the comparative anatomy of all systems and organs in the different vertebrate clases and taxa - Homology&Analogy - Ontogeny&Phylogeny - comparative anatomy of the integumentary system (Skin&Skin derivatives) in different vertebrate clasess; integument of cyclostomes, integument of fishes, integument of amphibia, integument of reptilia, integument of aves, integument of mammals - Comparative anatomy of vertebrate teeth - Comparative anatomy of the skeletal system in different vertebrate classes - Chondrocranium - Osteocranium - Dermatocranium - Splanchnocranium - Comparative anatomy of vertebral column - Comparative anatomy of peripheral skeleton (Girdles&Limbs) - Comparative anatomy of Circulatory system in different vertebrate classes - Comparative anatomy of the heart - Comparative anatomy of the arterial system - Comparative anatomy of the venous system - Comparative anatomy of the nervous system in the different vertebrate classes - Comparative anatomy of the brain - Comparative anatomy of the spinal cord - Comparative anatomy of the cranial and spinal nerves - Comparative anatomy of the digestive system in different vertebrate classes - Comparative anatomy of the excretory system and kidney in different vertebrate classes - Comparative anatomy of the genital system and reproduction in different vertebrate classes - Male reproductive system - Female reproductive system - Comparative anatomy of sense organs (Eye - Ear - lateral line organ) in different vertebrate classes - Comparative anatomy of endocrine system in different vertebrate classes