Monocondylic skull.ĥ.Beneath the foramen magnum single occipital condyle is present. Dicondylic skullĥ.Beneath the foramen magnum a single occipital condyle is present.suupraoccipitai, exo occipitals,& basi occipital bones are also present in the occipital region. On either side Of the foramen magnum dorso-laterally exoccipital bones are present. Dicondylic skull.ĥ.Beneath the foramen magnum there are two occipital condyles. On either side of this concavity is a prominence - occipital condyle articulates with the first vertebra, occipital crest is formed. Beneath the foramen magnum a deep concavity is present. It is divided into occipital auditory, optic orbital & olfactory regions.Ĥ. It forms the middle hollow part of the skull. It is divided into occipital, auditory, optic orbital and olfactory regions.ģ. It forms the posterior median hollow part of the skull. It is divided into occipital, auditory, orbital, olfactory and optic regions.ģ. It forms the median hollow part of the skull. It is divided into auditory, olfactory and occipital regions.ģ. It is divided into occipital, auditory, orbital and ethmoidal regions.ģ. It is more or less a violin box open in front and behind with an arched roof and flattened floor. It consists of cranium, sense capsules, jaws and hyoid apparatus.ģ. It consists of cranium, sense capsules, jaws and hyoid apparatus.Ģ. It consists of cranium, sense capsules and visceral arches.Ģ. Skull is formed with ' mostly bony tissue.Ģ. Skull is formed mostly with bony tissue.ġ. Skull is formed mostly with bony tissues.ġ. Skull is formed mostly with bony tissues (but tadpole skull is cartilaginous)ġ. Skull is formed with cartilage tissues.ġ. The upper jaw and lower jaw are known as Maxilla and Mandible respectively: FISH SKULL-SHARK(SCOLIODON)ĬOMPARATIVE ANATOMY OF SHARK SKULL-FROG SKULL-LIZARD SKULL- BIRD SKULL –RABBIT SKULL IN TABEL SKULL OF Scoliodon (Shark)ġ. The visceral arches are collectively known as the splanchno cranium. The second arch is hyoid arch and the remaining five arches are termed bronchial arches. The two jaws articulate their hind ends by hinge joints which enable the mouth to open & close. The wide gap between the two jaws is the mouth. It also bears the teeth and form the lower jaw. The ventral half of the mandibular arch is called Meckel's cartilage. Each side of the dorsal half is termed the palato -pterygoid Quadrate Cartilage. The first one is the largest and highly modified - 'Mandibular arch. Mostly seven visceral arches are present. The visceral arches develop around anterior (Pharyngeal) part of the embryonic gut from the cells of neural crests. The cartilaginous cranium is called chondro cranium and bony cranium is called dermato cranium. These are known as olfactory, optic and auditory capsules respectively. Cranium includes three pairs of capsules for smell, sight and hearing. The cranium is developed from the mesodermal cells soon after the appearance of the brain. The skull includes two major parts - 'Cranium' enclosing the brain and the organs of special sense and Visceral arches' which form the jaws and frame work of pharyngeal wall. The skull develops in the head of animal body. Preavious topic: Respiration in birds-reptiles-mammals Appenducular skeleton - includes the girdles and limb bones. Axial skeleton - includes the skull and vertebral column. The endo skeletal structures are formed with cartilages and bones which are the living tissues. The vertebrates possess the hard parts inside the body. The hard parts of the animal body are collectively known as skeletal system or simply skeleton. Be sure to scrape AWAY from you, carefully chip away the roof of the skull to expose the brain.SKULL OF FISH (SCOLIODON), SKULL OF AMPHIBIAN (RANA) SKULL OF REPTILE (CALOTES)SKULL OF BIRD (COLUMBA) SKULL OF MAMMAL-RABBIT (ORYCTOLAGUS)-COMPARATIVE ANATOMY With a scalpel, scrape the top of the skull until the bone is thin and flexible. Cut away the skin and flesh on the head from the nose to the base of the skull. Removal of the Frog's Brain: Turn the frog dorsal side up. Posterior to the cerebellum is the medulla oblongata (E) which connects the brain to the spinal cord (F). The ridge just behind the optic lobes is the cerebellum (D), it is used to coordinate the frog's muscles and maintain balance. Posterior to the cerebrum are the optic lobes (C), which function in vision. Just posterior to the olfactory lobes are two oval structurs, the cerebrum (B), and it is the frog's thinking center. Starting at the most anterior part of the head, the olfactory nerves connect to the nostrils and then to the olfactory lobes (A) where odors are processed.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |