2. Warm-Up #5 Complete Analyzing Data questions #1-5 on page 935 of your text.

4. Objectives State the functions of the skeletal system Describe the structure of a typical bone Explain how bones develop Identify the three different kinds of joints

5. Lab Review

6. Types of Joints Immovable—skull sutures Slightly movable—vertebrae Freely movable –Ball and socket—full range of movement-- shoulder, hip –Hinge—back and forth movement—knee, foot –Pivot—rotate around another bone—elbow, neck –Saddle—bone slide in two directions--hand

7. Endoskeletons also have……. Joints where 2 bones come together At these joints you find Tendons that hold muscle to bone, “muscle tenders” Ligaments that hold bone to bone http://www.davidlnelson.md/images/Tendon_both_repaired_DSCN1768.jpg

8. Support Systems may be: Exoskeleton:Endoskeleton: Hard outer covering Internal set of bones

9. Function of EndoSkeletons Support Protection of internal organs Movement (with muscles) Mineral Store (calcium, magnesium, etc) Blood cell production (bone marrow)

10. Endoskeletons made of a.Axial: skull, backbone, ribs, sternum b.Appendicular: arms, legs, shoulders, hips,wrists, ankles

11. Bone Structure : Know functions for each structure with blue dot.

12. Bone Cells Osteocytes—mature bone cells—skeletal lab Osteoblasts—cells that produce bone Osteoclasts—cells that break down bown

13. Cartilage is replaced by bone during the process of bone formation called ossification. Bone tissue forms as osteoblasts secrete mineral deposits. When the osteoblasts become surrounded by bone tissue, they mature into osteocytes = bone cells!

14. Bone Marrow Red Marrow—makes red blood cells, some white blood cells and platelets. Yellow Marrow—Fat cells

15. The Amazing Ability of Bone Ossification and Technology

16. Cartilage and the Skeleton Provides a smooth surface for easy gliding at joints Shock absorber

17. Types of Joints

18. Summary What are the functions of the skeletal system? What is the structure of a typical bone? How do bones develop? What are the three different types of joints? Give some examples.

19. The Muscular System Specialized organelle #5

20. Objectives Describe the 3 types of muscle tissue Explain how muscles contract.

21. Three types of Muscle : A. Smooth: involuntary control of internal organs for digestion, & blood vessels B. Cardiac: involuntary control of the heart C. Skeletal: Voluntary control of the skeletal muscles for movement

22. The Musculature System…….. Structure: Voluntary Muscles Striated-Skeletal Involuntary Muscles Cardiac- Heart Smooth-Stomach Striated Skeletal Several nuclei Box shaped, many mitochondria

23. Cardiac Muscle: Fewer Striations Fewer Mitochondria Large nuclei Lattice work of spaces between some cells Still square shape One nuclei per cell

24. Smooth Muscle: Eye shaped One nuclei per cell No lattice work No striations Long & drawn out Fewer Mitochondria Stomach, Intestines, blood vessles

25. SKELETAL CARDIACSMOOTH VoluntaryINVOLUNTARY Know differences/similarities between the 3 types!

26. How Do Muscles Contract? Muscle bundles work in opposite pairs: Contracting & Relaxing by pushing and pulling bones (biceps & triceps in the arms)

27. Sliding Filament Theory of Muscle Contraction: Let’s Watch Know how muscles contract – what role do actin, myosin, Ca ++ & ATP play?

28. Summary What are the 3 types of muscle tissue? –Give Examples. –Which are voluntary? Involuntary? What function do actin and myosin have in muscle contraction? What role does calcium play? What happens to the sarcomere during contraction?

29. The Integumentary System Your Skin

30. Objectives State the functions of the Integumentary system Describe the skin structure Describe how skin can protect the body from UV exposure.

31. The Skin..……….. the largest organ in the body Functions: Barrier against infection and injury Regulate body temperature Remove Waste Protection from UV Insulate Sensory Receptors

32. The Skin: Structure………. a.Epidermis made of epithelia b. Dermis with sweat glands hair follicles oil glands capillaries nerve cells

33. Melanin & Melanocytes Melanin is a protection against UV radiation. Contributes to skin pigment Why do we sun burn? Discovery Video

34. Sun Damage

35. Summary What are the functions of the integumentary system? What are the two layers of the skin? –What is the epidermis made of? –What is contained in the dermis? What substance in your body protects from UV exposure?

36. Muscle Minutes Lab

37. Homework—Due Wednesday 2/16 Complete Muscle Minutes Lab Quiz Next Class Prepare Homework Packets –Warm-Ups #5-6—4 points –Study Guide—2 points –Skeletal Lab—2 points –Muscle Lab—2 points –Extra Credit Article Summary—2 points

38. When the skin doesn’t protect. HPV – human papillomavirus = WARTS My Shocking story - Treeman