Post on 05-Jan-2016
SKELETAL SYSTEM
Review Names of Muscles
Review Other Structures:
Tendons Ligaments Cartilage
Interesting Schtuff about Bones
Bones have the same strength as cast iron and remain as light as wood
If calcium levels in the body get too high or low the muscles and nerves will not function properly
When women become pregnant they may, and usually do, take calcium from their own bones in order to help out in the womb
Write your guess to these in your notebooks.
How many bones are in the body?
What’s the purpose of having bones? (4 answers)
What are the different types of bones? (5 answers)
Discussion:
Youtube: The Human Skeletal System
What Were the Purposes of Bones:
Protection Structure Regulating minerals Movement
Long Bones
Some of the longest bones in the body and some of the smallest.
longer than are wide, growth plates (epiphysis) at either end, hard outer surface (compact bone) and a
spongy inner cavity (cancellous bone). Both ends covered in cartilage for
protection and shock absorption.
Short Bones
Approximately as wide as long, Provide support and stability with little
movement. Contain large amounts of bone marrow
Examples: Carpals and Tarsals - the wrist and foot
bones.
Flat Bones
Strong, flat plates of bone Provide protection Base for muscular attachment In adults, the highest number of red blood
cells are formed here.
Examples: Scapula (shoulder blade). The Sternum
(breast bone), Cranium (skull), os coxae (hip bone) Pelvis and Ribs are also classified as flat bones.
Irregular Bones
Don’t fall into any other category, due to their non-uniform shape.
Examples of these are the Vertebrae, Sacrum and Mandible (lower jaw).
Sesamoid Bones
Usually short or irregular bones, embedded in a tendon.
Usually present in a tendon that passes over a joint and protects the tendon.
Example: Patella (knee cap) which sits within the
Patella or Quadriceps tendon.
Review
What do tendons do? What do ligaments do? What does cartilage do?
With a partner, name the five kinds of bones.
BonesFront View (Anterior)
Back View (Posterior)
Assignment:
Make a skeleton out of the medium of your choice and label the 20 bones that are on your chart.
Due: Oct. 29