1 Gives shape and support 2 Protects internal organs Skull Ribcage 3 Muscles attach to bones 4 Blood cells are formed in bone marrow 5 Calcium and Phosphorous storage httpkidshealthorgkidhtbwSSmoviehtml ID: 654044
Download Presentation The PPT/PDF document "Skeletal System 1). Five Major Function..." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Skeletal System
1). Five Major Functions of Skeletal System:
1. Gives shape and support
2. Protects internal organs. (Skull, Rib-cage)
3. Muscles attach to bones.
4. Blood cells are formed in bone marrow.
5. Calcium and Phosphorous storage. Slide2
http://kidshealth.org/kid/htbw/SSmovie.html
http://www.abcya.com/skeletal_system.htmSlide3
Major Organs
A
:
Skull Connects to the top of the Spine. Made up of cranium (8 plates), and mandible.Protects the brain, eyes, ear and nose.B. Spine (Vertebrae) Helps to keep you upright.1. 33 linked bones that get smaller as they go down. Between each
vertebrae is a cartilage cushion called a disk.Slide4
Skull and SpineSlide5
Rib Cage
:
12
pairs of ribs one pair are “floating”Link to vertebrae in back, to the sternum in the front.Protects heart, lungs, and other organs.
Note the cartilage Slide6
Arms
and handsClavicle and shoulder blade (scapula)Upper arm is the humerus, the lower arm is the ulna (longer) and
radius. 27 bones in wrist and hands (carpels
, metacarpals, and phalanges
).Slide7
27 bones in wrist and hands (
carpels
,
metacarpals, and phalanges).E: Pelvis: Made of 5 fused vertebrae and hip bones.Slide8
Legs
Legs:
Connected to pelvis.
Upper leg (femur), kneecap (patella), Lower-leg (tibia-shinbone, fibula).26 bones in the feet. (tarsals, metatarsals, phalangesSlide9
Interesting facts
A). Development of Bones:
1). Many bones develop from cartilage as we age.
2). Cartilage cushions bones and allows them to “slide” across each other as they move. 3). Cartilage is 3 times as slick as ice; and acts as a “shock absorber”. 4). Bones are composed of Calcium, Phosphorus, and Magnesium. (Phosphorus is a non-metal).Slide10
Cartilage Slide11
Joints
B)._Skeletal Joints:
1). All bones that move, use joints.
2). Joints are where two bones are connected close together by ligaments and allow movement.3). There are six types of joints:Ball and socket: hip and shoulder.Hinge: Elbow, fingers, toes, knee….Pivot joint: upper neck, lower arm..
Saddle joint: base of thumb.Gliding joint: wrist, ankle.
Ellipsoid joint: base of fingers and toes. Slide12
Muscular System
What
makes us move.
There are over 600 muscles in the human body that control all movement.Slide13
Skeletal Muscle Slide14
There are three types of muscle:
A
).
Skeletal: The muscles that attached to bones by tendons, and provide movement. Skeletal muscles are striated (banded), and are able to be voluntarily controlled by the person. Skeletal muscles react quickly and tire quickly.
B). Smooth Muscle:
Un-striated and involuntary. Are unconsciously controlled by your brain, and control
things like blood pressure, breathing, and digestion.
C).
Cardiac Muscles
: Found only in the Heart and tightly inter-woven, they are involuntary and never tire (they stop; and you die). Slide15
Smooth Muscle Slide16
Heart Muscle Slide17
Action of Skeletal Muscles
1). Work only by contracting.
2). Muscles always work in pairs, one against the other. (antagonistic).
3). Skeletal muscles are voluntary and are controlled by nerve impulses. Muscles work on what is known as the all or nothing principle…they contract all the way or not at all. The strength of a movement is controlled by how much of a muscle is used. Picking up a paper clip uses very little of the bicep, lifting a child uses all of the biceps muscle.Slide18
Muscle in Action Slide19
Injuries to the Skeletal or Muscular
Systems
Sprain: a torn or pulled tendon or ligament. Usually pretty painful (sometimes more so than a fracture), with moderate swelling, but still functional and usually heals within a few weeks getting progressively better each day. Fracture:
Any break in a bone. Ranges from a simple fracture (just cracked, but still in place) to a compound fracture (one or both ends of the bone are forced through the skin causing deep lacerations). Most are simple fractures, and they can be almost painless to extremely painful, usually with swelling and bruising. Bones heal by binding back together with new bone cells (remember bones are alive). Most fractures heal between 6 and 8 weeks.
Osteoblasts
a type of bone cell rebuild bones that are injured and form all bone tissue.
Dislocation:
When a bone is forced out of its joint
. Very Painful! Generally, the pain is greatly reduced when the bone is put back in place, other than the pain from the bruising that often occurs when a bone dislocated. Slide20
Sprain Slide21
Simple Fracture & Compound Fracture Slide22
Dislocation