Skeletal System Pick up your bell ringer on your way to your seat - PowerPoint PPT Presentation

Skeletal System Pick up your bell ringer on your way to your seat and begin wri7ng ☺

Func7ons of the Skeletal System � There are SIX main func7ons of the Skeletal System. These include: 1. Providing support for the body 2. Protec7ng internal 7ssues and organs 3. Ac7ng as a framework for aEached muscles 4. Allowing movement of limbs and digits 5. Producing new red and white blood cells 6. Storing fat and minerals

Components of Skeletal System � There are THREE main parts of the skeletal system: 1. Bones 2. Connec7ve Tissue 3. Joints

Bone Structure � The outer layer is hard, densely packed, compact bone � Beneath the outer layer is spongy bone � Marrow: A 7ssue in the center of some bones � A less dense bone with cavi7es filled with red bone marrow, where blood cells are produced � Some bones have yellow marrow, which stores fat

Bone Categoriza7on � Bones are categorized by shape. � Long Bones • Ex. humerus, femur, radius, ulna, 7bia and fibula � Short Bones • Ex. wrist bones � Flat Bones • Ex. rib bone, scapula, and sternum � Irregular Bones • Ex. vertebra, hip bone, and skull bones

Connec7ve Tissue � Car7lage � Strong, flexible connec7ve 7ssue � Acts as a cushion between two bones � Shapes soV parts of the body (i.e. ears, 7p of nose)

Connec7ve Tissue � Ligaments � A band of connec7ve 7ssue that aEaches one bone to another � Ligaments aEach to bones to create joints � Tendons � A fibrous cord that aEaches muscle to the bone

BIG IDEA 1. Recall the percentage increase in sports related knee injuries in the last decade. 2. Explain why knee surgeries can disrupt a child's growth.

Joints � Joints are points in which bones meet � Some joints do not move (i.e. joints in between bones of the skull) � Flexible joints are joints that do allow movement and include: � Ball-and-socket joints � Hinge joints � Pivot joints � Ellipsoidal joints

Skeletal Problems � Fractures � Hairline • Occur when the parts of the bone do not separate � Transverse • Occur when the fracture is completely across the bone � Comminuted • Occur when the bone shaEers into more than two pieces

Skeletal Problems � Injuries to Joints � Disloca7on • Results when bones slip out of place � Torn Car7lage • Results from a sharp blow to a joint or a severe twis7ng of a joint � Bursi7s • Results from painful inflamma7on of a bursa – A burse is a fluid-filled sac that can help to reduce fric7on in joints

Skeletal Problems � Injuries to Joints Con7nued… � Bunions • Painful swellings of the bursae in the first joints of big toes. – Wearing ill-fiEed shoes make bunions worse � Arthri7s • Inflamma7on of a joint • Can result from an injury, natural wear and tear, or disease • They can live normal lives if they manage the disease

Skeletal Problems � Repe77ve Mo7on Injury � Carpal Tunnel Syndrome • Ligaments and tendons in the wrist swell • Pressure on nerves cause numbness, 7ngling in the thumb and forefinger, pain, and weakness in the hand � Scoliosis • Curving of the backbone • The spine curves to one side of the body in an S-shape or C-shape.

Skeletal Problems � Osteoporosis � The gradual loss of bone 7ssues � Bones weaken and become briEle

Preven7ng Problems Good health habits can keep your bones strong and healthy! • A diet that is rich in nutrients such as protein, fiber, potassium, and vitamin C can help keep your bones stay strong • Physical ac7vity helps keep bones healthy and strong • Good posture means the bones and joints in your back stay in place and your muscles are used properly

Health Lab!! in your notes