1. Muscular System

2. Did you know? 40% of our body weight is muscle
There are over 30 facial muscles
The meat you eat are the organisms muscles
Which the biggest muscle?
The heart is a muscle

3. Skeletal Muscle Fibers
Muscles of the Body
Made up of:
________ muscle tissue
_________ tissue
________ Vessels
___________
Skeletal
Connective
Blood
Skeletal Muscle Fibers

4. Skeletal Muscle Fibers
Are grouped in bundles called _________
__________ are bundled together by __________ tissue to create a __________.
Fasicle
Fasicles
Connective
muscle

5. Muscle Fibers Contain many _________ which have two filaments
1. Actin _________
2. Myosin ________
myofibrils
(thin)
(thick)

6. Actin vs Myosin

7. Table Talk
Muscle fibers have many nuclei. Which other organelle would be the most abundant in muscle fibers? Why?
Complete the flow chart in your notes

8. Which muscle is being used?

9. Which muscle is being used?

10. Which muscle is being used?

11. Which muscle is being used?

12. Muscle Review Game

13. How does this effect movement?

14. How does this effect movement?

16. Tendons vs Ligaments Tendons Attach muscle to _________ Ligaments
Attach bone to _________
bone
bone

17. Muscles Move in Pairs Muscles move in ____________ pairs opposite
While one _________ the other __________
opposite
flexes
extends

18. How Muscles Contract Actin and myosin _____ Myosin ______ actin
Results in muscle __________
Muscle fibers ________
Muscles relax
bind
pulls
contraction
detach
Actin and myosin bind (forms cross bridge)
Myosin pulls actin (power stroke)
**ATP is required

19. Muscle Contraction

20. Livor Mortis Blood __________ in body parts closest to the ___________
Skin appears ____________
Onset __________ after death
Last about __________
accumulates
ground
Blue-purple
30 minutes
12 hours

21. What effects Livor Mortis?
Affected by things that __________ blood flow
E.X
Helps determine if the body _____________
restrict
has been moved

22. Estimating Time of Death Rigor Mortis
The stiffening of ________ after death
Muscles remain ________
muscles
contracted
Muscles remain contracted due to an accumulation of calcium.

23. Continued Starts __________ after death
Begins to reverse around _________
2 hours
15 hours

24. What can you tell me about this victim?

25. Example #1 Is this livor mortis or rigor mortis?
Explain the pattern on the body?

26. Example #2 Which muscles are effected by rigor mortis?
How long has she been dead?

27. Example #3
Explain the markings on the pig

28. Example #4
Where does lividity appear?

29. Algor Mortis Cooling ________ of the body after ______ death
Body cools at ____ degrees/hour
Cooling
death
1.5

30. Which muscle(s) am I using?
Bicep Curl Wall squat Leg extension Shoulder fly Sit up Cherry picker
Identify the flexor and extensor for each exercise.

31. Factors Effecting Algor Mortis
Amount of body fat
Amount of _____
_____________
Clothing
Temperature

32. Table Talk Are fainting goats correctly named? Why or why not?

33. Kenny
Oh no! Someone killed Kenny! The body of Kenny was found this morning in the front office, according to investigators his body temperature was 72.6 degrees. How long has he been dead?

34. Miley Cyrus
The body of Miley Cyrus was found last night, according to investigators her body temperature was 50.2 degrees. How long has she been dead?

35. Carl
Looks like a Walker finally got to Carl! Carl’s body (or what’s left of it) was found on a snowy embankment. According to investigators his body temperature was 78.6 degrees. How long has he been dead?
How did the weather effect the cooling of his body? Explain your answer.

36. Kim Kardashian
Kim Kardashian was found dead on Sunday, she was dressed in a velvet track suit and a beanie. According to investigators her body temperature was 86.4 degrees when they arrived on scene. How long has she been dead?
How long has she been dead? How did her clothing effect the cooling of her body? Explain you answer.

37. Homer Simpson
Homer Simpson has eaten his final donut. His body was found on Friday afternoon, according to investigators his body temperature registered at 82.6 degrees. How long has he been dead? How did his body mass effect the cooling of his body? Explain your answer.

38. James Marsden
The body of James Marsden was found face down at the Santa Fe dam. His body was found lying face up. There were blue-purple marking on his back. Was his body moved after death? What leads you to think this?

39. Young Girl
You arrive at your crime scene and see the body of a young girl. She is lying face down in the grass with her arms under her body and her legs were shaped in an ‘x”. There are blue-purple marking covering the entire back of her body, EXCEPT for her buttocks and shoulders which were left in the coloring of her normal skin tone