Presentation on theme: "Lab 4 Bone and Axial Skeleton J.R. Schiller, PhD., G.R. Pitts, PhD., & Amy L. Thompson, Ph.D."— Presentation transcript:
Lab 4 Bone and Axial Skeleton J.R. Schiller, PhD., G.R. Pitts, PhD., & Amy L. Thompson, Ph.D.
Lab 4 Activities 1.Describe functions of skeleton 2.Learn histology of bone and cartilage using microslides, figures, and osteon models 3.Learn general anatomy of a long bone 4.Classify bones by shape/origin 5.Define each of the various bone markings 6.identify all bones and their bone markings of the axial skeleton individually or in articulated skeletons (see list, pp. 4-9 to 4-13)
Functions of Bones Support - framework for body Protection of: –many internal organs including the brain, spinal cord, thoracic (heart and lungs) organs, and pelvic (reproductive) organs Movement - muscle attachments to bones Mineral homeostasis – storage resevoir of Ca ++, PO -4 Hemopoiesis: Site of blood cell production in red bone marrow
Bone Tissue CompactCompact –appears very dense SpongySpongy –small struts of bone = trabeculae are generally oriented with the directions of stress
Classification of Bones Long, short, flat, and irregular (shape) Wormian (Sutural): extra flat bones of cranium Sesamoid: bones that form in tendon –Normal: patellae –Pathological: bone spurs
Structure of a Long Bone Diaphysis (shaft) –medullary (marrow) cavity red (hematopoietic) marrow in infancy yellow (fat) marrow later –Compact bone (mostly) –nutrient foramina Epiphyseal Plate (line) Connects diaphysis to epiphyses epiphyseal plate - growth plate in childhood Epiphyseal line when growth ends Epiphysis (“end”) –nutrient foramina –articular cartilage - hyaline cartilage –Spongy bone w/red marrow