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WARMUP: 4 Interesting Facts about the Skeletal System

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20% of your body weight is bone. On your own paper, do the math: (Your body weight) X 0.20= You have 206 bones. More than of these are in your hands and feet. – PowerPoint PPT presentation

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Title: WARMUP: 4 Interesting Facts about the Skeletal System


1
WARMUP 4 Interesting Facts about the Skeletal
System
  • 20 of your body weight is bone. On your own
    paper, do the math
  • (Your body weight) X 0.20
  • You have 206 bones. More than
  • ½ of these are in your hands and feet.
  • How many bones is that?
  • There are 30 bones in your skull.
  • Your largest bone is your femur and
  • your smallest bone is in your ear!

2
Skeletal System
  • Its all about the bones!!!

3
2. Functions of the Skeletal System
  • Provides shape and support
  • Protects internal organs
  • Enables you to move (works with muscles)
  • Produces blood cells
  • Stores materials for future use (HOMEOSTASIS
    ALERT!)

4
3. Shape and Support
  • Skeletal system provides shape and support for
    body
  • Shape depends on the organ or organ system it
    needs to protect
  • Example
  • Your skull is thick and round to cover your
    brain!

5
4. Protects Internal Organs
  • Skeletal System protects your internal organs
  • Organs can be easily squished
  • Example
  • Heart and breastbone
  • Spinal cord and spine
  • Lungs and rib cage

6
5. Enables you to move
  • Muscles work with bones to make you move

7
6. Produces Blood Cells
  • Bones produce substances our body need
  • Blood cells (white and red) made in the marrow of
    the long bones of the arms and legs

Bone Marrow
8
7. Stores Materials for Future Use
  • Stores substances until your body needs them
  • Stores calcium and phosphorus
  • Homeostasis alert!
  • Bones release small amounts of calcium and
    phosphorus into your body when needed!

Compact bone where blood vessels are and
minerals are stored
9
8. Joints of the Skeletal System
  • The bones of the skeletal system are connected at
    areas called joints
  • Where two or more bones come together
  • The body has moveable and
  • immoveable joints

10
9. Immovable Joints
  • Joints in the body where there is little or no
    movements
  • Examples
  • Skull
  • Ribs

11
10. Movable Joints
  • Joints that allow movement.
  • Most of the joints in the body are movable.
  • There are 4 types of
  • movable joints
  • Ball and Socket
  • Pivot
  • Hinge
  • Gliding

12
11. Movable Joints of the Skeletal System
  • Ball and Socket Joints
  • Allows fullest range of motion
  • Examples shoulder and hip

13
12. Movable Joints of the Skeletal System
  • Pivot Joints
  • Allows one bones to rotate around another
  • Example neck vertebrae

14
13. Movable Joints of the Skeletal System
  • Hinge Joints
  • Allows forward and backward motion
  • Example knee and elbow

15
14. Movable Joints of the Skeletal System
  • Gliding Joints
  • Allows one bone to slide over another
  • Example wrist and ankle

16
15. Joints of the Skeletal System
  • Bones in movable joints are held together by
    strong connective tissue called ligaments.

Ligaments are like the tape that hold bones
together.
17
Homeostasis Summary
  • The body must constantly produce and replace new
    red and white blood cells.
  • The process of releasing and storing calcium goes
    on almost continuously to regulate balance within
    the body.

18
CPS Quiz
  • Skeletal System

19
1. What is a place in the body called where two
bones come together?
  1. Connections
  2. Hinge
  3. Joint

20
2. Which type of joint allows the bone to swing
in a full circle?
  • Hinge
  • Ball and
  • socket
  1. Pivot
  2. Gliding

21
  • 3. Do bones make blood
  • cells?
  • A. Yes
  • B. No

22
  • 4. What is the name of the tissue that holds
    bones together at a joint?
  • A. Cartilage
  • B. Tendon
  • C. Ligament

23
  • 5. What do your bones store (but not produce)
    that your body needs?
  • Phosphorus
  • White blood cells
  • Red blood cells
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