1. Resources To return to the lesson, click the Back button or press Esc.

2. Image Bank To return to the lesson, click the Back button or press Esc. The Skeletal System

3. Image Bank To return to the lesson, click the Back button or press Esc. The Skeletal System

4. Image Bank To return to the lesson, click the Back button or press Esc. Types of Bones

5. Image Bank To return to the lesson, click the Back button or press Esc. Long Bones

6. Image Bank To return to the lesson, click the Back button or press Esc. Short Bones

7. Image Bank To return to the lesson, click the Back button or press Esc. Flat Bones

8. Image Bank To return to the lesson, click the Back button or press Esc. Classification of Flexible Joints

9. Image Bank To return to the lesson, click the Back button or press Esc. Care and Problems of the Skeletal System

10. Image Bank To return to the lesson, click the Back button or press Esc. Care and Problems of the Skeletal System

11. Image Bank To return to the lesson, click the Back button or press Esc. Classification of Fractures

12. Image Bank To return to the lesson, click the Back button or press Esc. Osteoporosis

13. Image Bank To return to the lesson, click the Back button or press Esc. The Muscular System

14. Image Bank To return to the lesson, click the Back button or press Esc. Muscle Contraction and Bone Movement Click image to view movie.

15. Image Bank To return to the lesson, click the Back button or press Esc. The Nervous System

16. Image Bank To return to the lesson, click the Back button or press Esc. The Nervous System

17. Image Bank To return to the lesson, click the Back button or press Esc. The Nerve Impulse Click image to view animation.

18. Image Bank To return to the lesson, click the Back button or press Esc. Structure and Parts of the Spinal Cord

19. Image Bank To return to the lesson, click the Back button or press Esc. Structure and Parts of the Brain

20. Image Bank To return to the lesson, click the Back button or press Esc. Steps of a Reflex Action Click image to view animation.

21. Image Bank To return to the lesson, click the Back button or press Esc. Care and Problems of the Nervous System

22. Image Bank To return to the lesson, click the Back button or press Esc. Cerebral Palsy

23. We spend a third of our lives sleeping, but no one really knows why. During sleep, muscles relax and heartbeat and breathing rates slow. Brain waves become larger and slower during certain periods of sleep. Later, brain waves become faster and more frequent. This is when we have dreams we can remember. Click Next to continue. Read the passage below and then answer the questions. TAKS Test Practice

24. Sleep is essential for our health. Without sleep, we lose energy. After two days without sleep, concentration becomes difficult and we make mistakes. We experience difficulty thinking, seeing, or hearing. By the fourth day, hallucinations begin, and we see things that do not really exist. Human beings have been known to go without sleep for as long as 10 or 11 days, but they suffer terrible bouts of near insanity, which go away with a return to sleeping. Click Next to view the questions. Read the passage below and then answer the questions. TAKS Test Practice

25. 1. The author develops the passage by: A. explaining what happens when people sleep. B. comparing the effects of sleep and lack of sleep. C. describing sleep and explaining hallucinations. D. describing sleep and explaining why it is essential. To return to the lesson, click the Back button or press Esc. TAKS Test Practice

26. 2. Which phrase from the second paragraph helps the reader understand the meaning of the word hallucinations? A. terrible bouts of near insanity B. difficulty thinking, seeing, or hearing C. see things that do not really exist D. short-tempered To return to the lesson, click the Back button or press Esc. TAKS Test Practice

27. 3. Write a paragraph describing how you feel when you don’t get enough sleep. To return to the lesson, click the Back button or press Esc. TAKS Test Practice

28. Use this Foldable to help you organize your notes on the structure and function of the skeletal system, muscular system, and nervous system. Begin with three sheets of 8½” x 11” paper. Foldables Fold the sheets of paper along the long axis so that one edge is about 1” from the other. To return to the lesson, click the Back button or press Esc. Before you read

29. Foldables Fold the paper in half. Unfold and cut along the inside fold line. To return to the lesson, click the Back button or press Esc.

30. Foldables Repeat with the other two sheets of paper. Label as shown. Staple the sheets together. To return to the lesson, click the Back button or press Esc.

31. Transparencies To return to the lesson, click the Back button or press Esc. Types of Bones

32. To return to the lesson, click the Back button or press Esc. Long Bones Transparencies

33. To return to the lesson, click the Back button or press Esc. Short Bones

34. Transparencies To return to the lesson, click the Back button or press Esc. Flat Bones

35. To return to the lesson, click the Back button or press Esc. The Skeletal System Transparencies Your bones continue to grow both in length and in thickness until you are about 25 years old. At this stage bones usually stop growing,but may continue to thicken.

36. Transparencies To return to the lesson, click the Back button or press Esc. Classification of Flexible Joints

37. To return to the lesson, click the Back button or press Esc. Muscle Movement Transparencies

38. To return to the lesson, click the Back button or press Esc. The Skeletal Muscles Major muscle groups include the arms, legs, back, abdomen, Shoulders, and chest. Transparencies

39. To return to the lesson, click the Back button or press Esc. The Nerve Impulse Transparencies A nerve impulse begins when a sensory receptor is stimulated. The impulse travels to the CNS and is interpreted with the help of an interneuron. Then a motor neuron carries the message to a muscle cell or gland in response to the stimulus.

40. To return to the lesson, click the Back button or press Esc. The Nervous System Transparencies Nerves extend to various parts of the body along the length of the spinal cord.

41. To return to the lesson, click the Back button or press Esc. The Brain Transparencies

42. To return to the lesson, click the Back button or press Esc. Steps of a Reflex Action Transparencies Reflexes can prevent injuries. For example, when you touch something hot, your hand jerks away before you feel your finger being burned.