Bio II Notes 3/10
Bio II Notes 3/10 BIO 1144
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This 3 page Study Guide was uploaded by Rocket on Wednesday March 16, 2016. The Study Guide belongs to BIO 1144 at Mississippi State University taught by Thomas Holder in Spring 2016. Since its upload, it has received 20 views.
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Date Created: 03/16/16
Osteonic Canal: Passageway for vessels Lamellae: concentric rings of bone tissue Lacuna: spaces between lamellae where osteocytes are located Canaliculi: microscopic canals that connect lacunae to lacunae to the osteonic canal Skeleton (2 parts region) +Axial Skeleton : includes all bones associated with the central axis of the bottom; skull, ribs, sternum, and vertebral column +Vertebrae: Cervical (neck) Thoracic (upper back) Lumbar (lower back) Sacral (hip) Caudal (tail) In humans, Coccyx (tailbone) *Number of each varies among vertebrates *All of these allow vertebrates flexibility, support, and protection of nerve chord +Appendicular Skeleton : everything associated with the appendages; appendage bones (limbs/fins), pectoral girdle (shoulder), pelvic girdle (hip) +Pectoral Girdle: attaches front appendages to axial skeleton Scapula (2) Clavicle (2) +Pelvic Girdle: attaches hing appendages to axial skeleton Fusion of pelvis bones Fused to lower vertebral column Appendages: +Forelimb bones Humerus Radius and Ulna Carpals Metacarpals Phalanges *All attached to pectoral girdle +Hindlimb bones (legs) Femur (largest) Patella (knee cap) Tibia and Fibula Tarsals Metatarsals Phalanges *All attached to pelvic gridle Joints + Bones + Muscle(skeletal) enhanced movement better contact with substrate advanced locomotor skills Muscular System Tissue Types: 1. Skeletal Muscle Striated Pattern Voluntary movement Multinuclei Mostly associated with skeletal Fiber cell type 2. Cardiac Muscle Only found in heart Striated pattern Involuntary movement 12 nuclei Fiber cell type Branching Intercalated disks, electrical impules Contraction “pumps” blood 3. Smooth Muscle Not striated Involuntary movement Single nucleus, centralized Walls of internal organs +glands Skeletal Muscle Structure +Muscle Fascicles: Collection of skeletal muscle fibers bounded by connective tissue Skeletal Muscle cell fibers Each fiber composed of myofibrils (series of filaments) Thin and thick filaments (myofilaments) “Contractile proteins” Actin: thin Myosin: thick
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