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Published byEsmond Daniel Modified over 8 years ago
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Musculoskeletal System
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Common names
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Vocabulary Lesson 2 1. skeleton – the framework of connected bones in your body 2. bone – is an organ of the skeletal system that stores minerals 3. bone marrow – soft tissue inside a bone that makes blood cells and stores fat
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4. cartilage – the tissue between the bones in your movable joints 5. joint – is a place where two or more bones meet 6. ligament – connects bones together at joints 7. tendon – attaches muscles to bones
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8. Osteoporosis – a disease in which the bones become weaker 9. arthritis – painful joints 10. voluntary muscles – muscles you have control over 11. involuntary muscles – muscles you do not have control over
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1. What is your Skeletal System? a. The skeleton is the framework to hold you up and protect organs –b. More than 200 bones – 206 as an adult
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–c. Almost every bone is connected to another bone by a joint i. Ligaments hold two bones together at joints ii. Joints also allow bones to move iii. Tendons attach muscles to bones
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–d. types of bones – long, short, flat, irregular
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2. Bone and joints 2. Bone and joint development –a. cartilage between bones in movable joints, keeps bones from grinding together –b. soft flexible tissue when you are a baby, as you get older it hardens and becomes bone tissue as minerals, such as calcium, build up in the bone
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–c. types of joints – fixed, slightly moveable, and synovial (ball and socket, hinge, gliding, pivot, and saddle) –d. Osteoporosis – is a disease in which the bones become weaker –e. Arthritis – is irritation of the joints, painful joints
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Joints
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3. What is your muscular system? –a. Made up of all your muscles –b. Movement occurs by contracting the muscle (length shortens) –c. Some muscles stretch across movable joints
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–d. Connection of bone to muscle = tendons, bone to bone = ligaments –e. Muscles only pull, not push – helped by working in pairs - ex: bicep and tricep When one contracts, the other relaxes –f. muscles you have control over are voluntary – EX: moving your arm to catch a ball, muscles that you do not have control over are involuntary – EX: heart beating
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4. Kinds of muscles Skeletal muscle – muscles that is attached to bones, when they contract they pull on bones causing bone movement Smooth muscle – is muscle that forms some internal organs, contraction of this type of muscles pushes materials through the organ Cardiac muscle – is muscle that forms the heart
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Review Lesson 2 Review – Lesson 2 What does your skeleton do? What does bone marrow do? How do your muscles make your bones move? List the 3 kinds of muscles and describe their functions.
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