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AbdulateefLawalSkeletalSystem/Tissue,Joints,and SkeletalMuscle (Skeletal…
AbdulateefLawalSkeletalSystem/Tissue,Joints,and SkeletalMuscle
Skeletal system/Tissue
Spongy bone: No osteons. they composed of Trabeculae, osteocytes, extra cellular matrix
Compact bone: composed of osteons packed together.Also they are circular unit of nerves and blood vessel.
Major function: support
Major structure: Ligament, Bone, tendons
Component of a long bone: Epiphyses,diaphysis, articular cartilage, epiphyseal line , periosteum, compact bone, spongy bone
Red bone marrow: gelatinous material found inside the bone
Yellow bone marrow: Fat tissue and nutrient storage
Types of bone cells: Osteogenic, Osteoblast, Osteocyte, Osteoclast
Joints
Fibrous joints
Suture:joined by very short inter connecting fibers only in the skull
Syndesimosis: bundles of dense regular connective tissue
Gomphosis: Between teeth and aveoli peridental ligament
Cartilaginous joints:
synchondrosis: immovable joint located in the ribs
Symphysis: slightly movable joint which includes; pubic symphysis, intervertebral disc
Synovial joints: Component- Articular cartilage, joint cavity, articular capsule, synovial fluid, reinforcement ligament,nerves and vessel, bursae, articular disc
Structural types of synovial joints
plane, hinge,saddle, ball and socket,pivot and condylar
Skeletal muscle
Function: Generates heat, maintain posture, produce movent
Properties:Elasticity,extensibility,excitability,contactibility
Connective tissue layer: perimysium, epimysium,deep fascia, endomysium
Component: Sacrolemma, transverse (T) tubles, sacroplasmic reticulum, myofibrils and mitochondria, triad
components of neuromuscular junction: synaptic cleft, terminal button, synaptic visicle,axon