I. Objectives Describes the functions of the muscular system Illustrates how muscles are connected to the bones Explains/Demonstrates how muscles cause body movements Cites simple body activities that show the coordinated functions of the skeletal and muscular systems II. Learning Content The Muscle – Bone Connection How Muscles Work Science Ideas: Voluntary muscles are connected to bones. Tendons connect muscles to bones.

Muscles work in pairs. When a muscle relaxes, the other contracts. The contraction and relaxation of the muscles produce movement. The skeletal and muscular systems coordinate with each other to enable the body to move. References: Science and Health Manual pp. 31-34, Textbook pp. 59-60, 61-63 Science For Daily Use pp. 13-17, Into the Future pp. 12-18 Process Skills: observing, inferring, demonstrating Vocabulary: tendon, contract, relax Materials: pictures, flip chart Value: Taking care of the muscles

III. Learning Experiences A. ENGAGE 1. Health Inspection 2. Review Identify the kind of muscles.

1. _________________________

2. ___________________________

3. ______________________ B. EXPLORE 1. Pre-viewing Activity Have the pupils bend their arms and feel the tough tissue inside. What do you call this tough tissue on your arm? 2. Video viewing What are the standards to be followed in viewing? Let the pupils view the video presentation.

http://www.youtube.com/watch?v=jxk5tFiGVSE

http://www.youtube.com/watch?v=T-ozRNVhGVg

http://www.youtube.com/watch?v=xnnBtQ6IfxY C. EXPLAIN 3. Discussion/Analysis What is the first video about? Why we can move our bodies? How are muscles in our body arranged? What is the pair of muscles in our arm? In the second video, what happens when one muscle contract? In the third video, what is the relation between muscles and bones? Which allow us to move and have great movements? What word have you heard that shows relationship between muscles and bones? Give examples of muscle movements.

Have the pupils demonstrate some activities to show that muscles and bones work in coordination with one another (moving the legs, smiling, bending etc.) 4. Generalization What connect the muscles to bones? How do muscles work? What is the relationship of muscles and bones?

Tendons connect muscles to bones. Muscles work in pairs. When a muscle relaxes, the other contracts. The contraction and relaxation of the muscles produce movement. The skeletal and muscular systems coordinate with each other to enable the body to move. D. ELABORATE 5. Application Fill in the blanks with the correct answer.

1. The ________________ connects the muscles to the bones.

2. Muscles work in __________________. 3. The pair of muscles in our arms are __________________ and ____________________. 4. When one muscle relaxes, the other muscle __________________. 5. The skeletal and muscular system _________________ each other to enable the body to

move. 6. The contraction and relaxation of muscles produce _________________.

E. EVALUATE Directions: Choose the letter of the correct answer.

1. What connects a muscle to a bone? A. tendon B. ligaments C. cartilage

2. How do muscles work? A. separate B. pairs C. whole 3. How do muscles and bones related to one another? A. They work together at opposite direction. B. They coordinate each other causing movements of the body. C. They are separated by each other through cartilage. 4. One of a pair of muscles gets longer. What does this show? A. This muscle relaxes. B. This muscle contacts C. This muscle pulls the bone. 5. Which of these activities show that muscles and bones work together? A. beating of the heart B. movement of the stomach C. bending of the arms

F. ENRICHMENT Draw the muscles in your arms showing the tendons and the biceps and triceps muscles. Label them. PL =