Skeletal SystemWE_17_S627_1983.jpg

We are going to be talking about the Skeletal System and how and what it works for.
In my group is
Alison B.
Valerie P.
Becca J.

What is the Skeletal System?

  • Made up of organs called Bones.
  • Helps protect the internal organs, creates the 'framework' of the body, produces blood cells and works together with the muscular system by acting as levers.
  • Often grouped together with the muscular system to be as the musculo-skeletal system.
  • Broken up into 2 parts:
    • Axial Skeleton
    • Appendicular Skeleton
    • Axial forms the main trunk of the body. Skull, Spinal Column, ribs, breastbone.
    • Appendicual Forms the extremities, shoulder girdle, arm bones, pelvic girdle, leg bones.
Major Organs:
  • Bones
  • Cartilage
  • Joints
  • Tendons
  • Ligaments

-Bones vary in shape and size depending on where they are in the body. Medullary canal is a cavity in the diaphysis which is a long shaft of the bone and is filled with yellow marrow, mainly fat cells.
Endosterm which is the membrane that lines the medulllary and keeps yellow marrow intact.
The red marrow is found in certain bones(Vertabraes, Ribs,sternum,cyanum,ends of humerous femur)

BoneMarrow.gif-Red blood cells equal erythrocytes.
-White blood cells equal leukocytes.
-Platelets equal thrombocytes.

Red marrow is used to diagnose blood disease.
The outside covering of tha bone is called the Periosteum which contains
blood vessels,osteoblast a speacial cell that forms new bone tissue.
Periosteum is necessary for bone growth,repair, and nutrition.

Fun Facts:
Average adult Human has about 206 bones.
A baby is born with 236 bones

This system is a set foundation for all other systems since it provides the framework of the body for internal organs, provides blood cells for circulation, and works together with the muscular system.

Relevant Articles:
- Bone Density Sharply Enhanced by Weight Training, even in elderly
- Prozac may stunt bone growth in Children, new research suggests
- Osteoporosis remains undiagnosed in millions of Americans; here's how to beat the disease with nutrition, exercise and sunlight