Presentation on theme: "Skeletal and Muscular Systems"— Presentation transcript:
1 Skeletal and Muscular Systems 8th Grade Growth and DevelopmentLesson 1
2 The Skeletal SystemBody System: a group of organs that work together to perform an important function.Skeletal System: a Frame work of bones that supports you, allows you to move, protects vital organs and producesblood cells.
3 The Skeletal System Made up of 206 bones. Bones of the arms, legs and pelvis provide movement when attached to muscles.Bones of skull, face, spine, and rib cage give you shape and protect organs.
4 Important Bone Terms- Support and Control Cartilage: strong flexible tissue on the ends of some bones, providing a cushion where bones come together.Ligaments: strong cords of tissue that connect the bones in your joints.
5 Your JointsJoint: A point at which to bones meet. Without joints, you wouldn’t be able to bend, move, walk or grasp!3 Types of joints….
6 Types of JointsHinge Joint: Allows bones to move back and forth. Knees and ElbowsFixed Joint: a joint that does not move. SkullBall and socket joint: allows a wide range of movement. Shoulder and Hip
7 Skeletal Problems Scoliosis a deformity of the spine in which the spine develops an S-shaped curve when viewed from behind.
8 Skeletal ProblemsOsteoporosis: a disease in which bones become thin and brittle.Fracture: crack or break in a boneSprain: stretching or partial tearing of ligaments.
9 Caring for your Skeletal System Exercise RegularlyWear shoes that fit properlySelect foods and beverages rich in calcium, phosphorus, and vitamin D.Participate in screening for scoliosis.
10 The Muscular SystemMuscular System: made up of muscles that help you move and maintain your posture.There are over 600 muscles in your body!Muscles account for about ½ your body weight
11 The Muscular SystemTendons: tough bands of tissue that attach muscles to bones
12 The Muscular System Voluntary Muscles: muscles you control. Also known as skeletal musclesExamples:BicepsTricepsQuadricepsDeltoid
13 The Muscular System Involuntary Muscle: muscles you do not control. Examples:HeartStomach musclesIntestinal muscles
14 The Muscular SystemSmooth Muscle: muscle found in body organs blood vessels, and glandsSmooth muscle is involuntary
15 The Muscular SystemCardiac Muscle: muscle found only in the walls of the heart.Cardiac Muscle is involuntary and continually contracts and relaxes to pump blood throughout the body.
16 Muscular Problems Muscle Strain: Muscles are stretched to far Low back strainMuscle SprainMuscle Cramp: muscle contracts and fails to relaxLower back pain: Results from poor posture and lack of exercise.
17 Caring for your Muscular System Exercise regularlyWarm up before exercisingSelect foods containing carbohydrates and proteinSleep in the fetal position on a firm mattressPractice weight managementLift objects by bending knees