Virtual Dissection of Scoliodon Cranial Nerves and Brain for B.Sc. III Year Practical
Explore the virtual dissection of Scoliodon cranial nerves and brain in this practical session for B.Sc. students. Learn about the origin, nature, and innervations of important cranial nerves. Discover the unique characteristics of the Chondrichthyes class. Join us on 11.09.2020 from 03:00 to 05:00 PM for a fascinating session presented by Ashok Kumar from the Department of Zoology at UCOS, MLSU, Udaipur.
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Presentation Transcript
Virtual Dissection of Scoliodon Cranial Nerves and Brain Class- B.Sc. III Year Practical Date: 11.09.2020 Time: 03:00 -05:00 PM Presented by Ashok Kumar Department of Zoology UCOS,MLSU, Udaipur.
S No. Exercise Regular Ex- Students 1 Dissection 18 25 2 Ecology/Ethology 09 12 3 Physiological and Biochemical 08 08 4 Spots (1-10) 20 20 5 Viva-voice 10 10 6 Record 10 -
Phylum: Chordata- Dorsal tubular nerve cord, notochord and gills present. Group: Craniata- Cranium Present Subphylum: Vertibrata- Vertebral column present Division: Ganothostomata- Jaws and paired appendage present Super class: Pisces- Paired fins, gills and skin with scales Class: Chondrichthyes- Cartilaginous endoskeleton, Scales are placoids, Sub Class: Selachi- Sharks and rays Order: Plurotrematra- gill slits lateral Family: Scyllidae Genus: Scoliodon (Dog Fish)
S Nr Name of the Nerve Origin Nature Innervations 1 Olfactory Olfactory lobe Sensory Nose epithelium 2 Optic Optic thalamus Sensory Retina 3 Oculomotor Ventral surface of mid- brain Motor Eye muscles 4 Pathetic Dorso-lateral side of mid brain Motor Superior oblique of eye 5 Trigeminal (5 branches) Side of medulla Mixed - 6 Abducens Ventral side of medulla Motor Posterior and external rectum muscles 7 Facial (3 branches) Cranium - - 8 Auditory Side of Medulla Sensory Internal Ear
S Nr Name of the Nerve Origin Nature Innervations 9 Glossopharyngeal (2 Branches) Venrto-lateral Side of medulla - - 10. Vagus (3 Branches) Side of Medulla - - 5. Trigeminal: 5 Branches- a. Opthatlmicus profundus- olfactory capsule and dorsal skin of snout b. Opthalmicus superficialis- skin of snout c. Maxillaris superior skin of upper jaw d. Maxillaris inferior- Posterior part of lower jaw e. Mandibularis- Muscles of lower jow
7. Facial : 3 Branches- a. Opthalmicus superficialis- sense organs of snout b. Ramus buccalis- Infera orbital lateral line organ c. Ramus hyomandibularis- 3 branches i. Mandibulari externus- Mandibular canal ii. Mandibulari internus- Mucous membrane of buccal floor iii. Hyoidean- Roof of buccal and pharyngeal cavity. 9. Glossopharyngeal : 2 Branches- a. Pre-trematic- mucous membrane of 1st gill b. Post-trematic- muscles of pharynx 10. Vagus : 3 Branches- a. Branchialis- gills b. Visceralis- Visceral oragan c. Lateralis- Lateral line trunk
