WILD 3580 1st Edition Lecture 38 Outline of Last Lecture I Hair II Color III Respiratory System IV Circulatory System V Reproduction Outline of Current Lecture I Skeletal System II Teeth Current Lecture I Skeletal System Unique pattern of bone growth o Well defined articular joints End of bone called epiphysis Shaft of bone diaphysis Middle of bone is the metaphysis in which bone growth occurs Doesn t ossify until maturity 1 Skull has two functions a Protect the brain b Surface for muscle attachment 2 Axial Skeleton forms the axis of the body a Vertebral column and ribcage b 5 sections i Cervical vertebrae neck usually 7 Atlas and Axis 1st and 2nd cervical vertebrae ii Thoracic vertebrae articulating with the ribs 12 to 15 iii Lumbar vertebrae lower back 4 7 iv Sacral vertebrae near and associated to the pelvic girdle These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute II Often fused with the pelvic girdle to form the sacrum v Caudal vertebrae tail number of vertebrates vary with tail length 3 Appendicular Skeleton limbs and limb supports a Pelvic girdle support for the hind limbs i Ilium ischium and pubis b Pectoral girdle for upper limbs i Clavicle collarbone and the scapula shoulder blade ii No skeletal connection to axis skeleton to allow more range of motion iii Connection from muscles c Limbs single proximal bone with two distal bones i 5 digits many modifications Teeth Greater degree in tooth differentiation that are adapted for various kinds of foods o Heterodont vary in structure and function Incisors Canines Premolars Molars o Homodont similar structure and function o Diphyodont 2 generations of teeth Deciduous dentition milk teeth Permanent dentition later on in life o Monophyodont one set of teeth Anatomy o Crown exposed above the jaw o Root set into the jaw Thecodont Tooth is set into the jaw like crocs Brachyodont low crowned tooth More of the tooth in the root than in the crown Mostly omnivores ect Hypsodont high crowned tooth More tooth in the crown than in the root Herbivores ect
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