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The function of the skeletal system, Types of bone and planes of movement.

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1 The function of the skeletal system, Types of bone and planes of movement

2 Functions: Provides a framework for the body Allows movement of the body as a whole and its individual parts The skeleton gives the body its distinctive shape and is the framework that which to attach muscles and other soft tissue. Without a skeleton we would be a big bag of…. FLUID!! Without a skeleton we would be a big bag of…. FLUID!! Bones act as levers and by forming joints allows muscles to pull on them and create joint movements… so we can move in all directions and perform the functions we need on a daily basis.

3 Protection Production of blood cells Certain bones contain RED bone marrow, the bone marrow produces RED blood cells, WHITE blood cells and PLATELETS Pelvis, Sternum, Vertebrae, Costals, Cranial bones Clavicle. The ‘certain’ bones are: Pelvis, Sternum, Vertebrae, Costals, Cranial bones and Clavicle. Bones will support and protect the vital organs they contain. What 4 examples can you think of???

4 Storage of minerals and fats Attachment of soft tissue for Calcium, Magnesium and Phosphorous Bones themselves are minerals stored within cartilage… acting as a mineral store for Calcium, Magnesium and Phosphorous. YELLOW Fats (triglycerides) are also stored within the YELLOW bone marrow. Muscles, Ligaments and Tendons. Bones provide the surface for attachment of soft tissues, such as Muscles, Ligaments and Tendons.

5 Long Bone Short Bone Femur Humerus Tibia Metacarpals Phalanges Having a body longer than it is wide and having growth plates at either end (epiphysis) They are approximately wide as they are long Function of Protection and Stability, with little movement Flat Bones Flat bones are strong, flat plates of bone with the main function of providing protection to the bodies vital organs and being a base for muscular attachment. Scapula (shoulder blade). The Sternum (breast bone), Cranium (skull), Pelvis and Ribs are also classified as flat bones

6 Irregular Bones Sesamoid Bones These are bones that do not fit into any other category due to their unusual shape. Good examples being the Vertebrae, Sacrum and Mandible (lower jaw). Sesamoid bones are usually present in a tendon where it passes over a joint, acting as protection to the tendon. The most obvious example: The Patella (knee cap) which sits within the Patella or Quadriceps tendon. Sesamoid bones are usually short or irregular bones, imbedded in a tendon.

7 Anterior Anterior – To the front Posterior Posterior – To the rear Medial Medial – Towards the midline Lateral Lateral – Away from the midline Proximal Proximal – Near to the root Distal Distal – away from the root Superior Superior – Above Inferior Inferior – Below Anterior Anterior – To the front Posterior Posterior – To the rear Medial Medial – Towards the midline Lateral Lateral – Away from the midline Proximal Proximal – Near to the root Distal Distal – away from the root Superior Superior – Above Inferior Inferior – Below Visual view of the anatomical structure

8 Task… Continue with the P1 assessment from yesterday, using the same word document! The different types of bone (i.e. long, short, flat, irregular, sesamoid) and identify the major bones within the body. The function of the skeletal system (i.e. support; protection; attachment for skeletal muscle; source of blood cell production; store of minerals) You should also finish off the work that you started in yesterdays lesson… making sure that you look at the rest of the assessment below. …If finished all of the above assessment, start to look at the different types of joints within the body (Elbow=Hinge Joint)


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