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Muscular System. Muscle and Bone Movement Muscular System There 630 active muscles in your body. Muscles are bundles of cells and fibers. Muscles tighten.

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Presentation on theme: "Muscular System. Muscle and Bone Movement Muscular System There 630 active muscles in your body. Muscles are bundles of cells and fibers. Muscles tighten."— Presentation transcript:

1 Muscular System

2 Muscle and Bone Movement

3 Muscular System There 630 active muscles in your body. Muscles are bundles of cells and fibers. Muscles tighten up, and then they relax.

4 Muscles Relax and contract to move bones Your muscles are all over your body

5 3 Types of Muscle:

6 1. Smooth Muscle cause your pupils to contract in the sunlight, visceral organs to contract. Is an Involuntary Muscle (moves without thought). Unstraited Smoot h muscle fiber Nucleu s

7 Smooth Muscle One type of tissue, smooth muscle, is found in the walls of your internal organs and blood vessels

8 Smooth Muscle The most common function of smooth muscle is to squeeze, exerting pressure on the space inside the tube or organ it surrounds in order to move material through it. Large and Small Intestine

9 2. Cardiac Muscle pumps heart. Involuntary Muscle and Straited Cardiac muscle fiber Striation Nucleus

10 Cardiac Muscle Cardiac muscle is found only in the heart and is adapted to generate and conduct electrical impulses necessary for its rhythmic contraction. Heart

11 30 sec muscle movement

12 Fact Our heart beats between 60 to 80 beats every minute, without having a break.

13 3. Skeletal Muscle move body. Voluntary Muscle and Straited Skeletal muscle fiber Nucleus Striation

14

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16 Muscles work in pairs. One contracts while another relaxes.

17 5 Structures of Muscle Tissue Muscle car – Renault 2006

18 1. Filaments There are two types: A. Thin - made of the protein actin. B. Thick - made of the protein myosin.

19 Muscle Filament

20 2. Sacromere a unit of thick and thin filaments.

21 3. Myofibril tiny cylindrical structures that makeup muscle fibers.

22 4. Bundle group of muscle cells are covered by sheath of connective tissue.

23 5. Muscle fibers have more than one nucleus to help relay messages faster. Triggered by nerve impulses. Remember muscle blocks from Chordates.

24

25 Trivia: Another word for sneezing is "sternutation."

26 Muscle

27 Doctors and misc Information

28 Types of Doctors / Medicine 1. Cardiology - heart 2. Oncology - cancer 3. Pediatrics - children 4. Geriatrics - Aging 5. Dermatology - skin 6. Obstetrics - childbirth 7. Orthopedics - bone

29 What does muscle strength depend on? Answer Muscle strength depends on the thickness of the muscle fibers and on how many of them contract at one time. Question 1

30 Study the diagram. What part of the skin is number two referring to? D. sweat pore C. muscle A. hair follicle B. vein Question 2

31 The answer is A, hair follicle

32 What becomes the primary source of ATP production for your muscles during heavy exercise? D. lactic acid fermentation C. myosin B. muscle contraction A. cellular respiration Question 3

33 The answer is D, lactic acid fermentation. Blood Lactic Acid Levels During Exercise Blood lactic acid Work rate Shift toward anaerobic process

34 What type of joint is used when you kick a soccer ball? D. gliding C. pivot B. hinge A. ball and socket Question 4

35 The answer is B. Hinge joints are found in your knees and toes, both of which you use when you kick a soccer ball. Hinge

36 What type of burn results in damage to the dermis and epidermis as well as blistering and scaring? D. fourth-degree C. third-degree B. second-degree A. first-degree Question 5

37 The answer is B. Second degree burns can cause damage to the dermis and epidermis, but skin function is not lost.

38 What are newly formed bone cells called? D. spongy bone C. compact bone B. osteoblasts A. osteocytes Question 6

39 The answer is A, osteocytes. Capillary Osteon systems Vein Artery Spongy bone

40 When does bone begin to replace cartilage in a human embryo? D. at the 9 th week C. at birth B. at the 12 th week A. during the last trimester Question 7

41 The answer is D. Blood vessels penetrate the membrane covering the cartilage and stimulate its cells to become potential bone cells.


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