there are 206 bones in an adult human. the human skeleton is divided into two parts axial;...
TRANSCRIPT
There are 206 bones in an adult human.
The human skeleton is divided into two parts
Axial; includes skull ribs and vertebral column
Appendicular; includes arms legs shoulders pelvis
Skeletal System
Skeletal System
supports the body.protects internal organs.provides for movement.stores mineral reserves.provides a site for blood cell formation.
Functions:
Bones are a solid network of living cells and protein fibers that are surrounded by deposits of calcium salts.
Skeletal System
Osteocytes, mature bone cells, which are embedded in the bone matrix.
Other bone cells Osteoclasts, break down bone. Osteoblasts, produce bone.
Skeletal System
Bone marrow is a soft tissue inside the cavities within bones. There are two types Yellow marrow is made
up of fat cells. Red marrow produces
red blood cells, platelets, and some white blood cells.
Skeletal System
The function of the muscular system is movement.
Function of the Muscular System
There are three different types of muscle tissue:
Skeletal
Smooth
Cardiac
Skeletal muscles generally remain in a state of partial contraction called resting muscle tone. Muscle tone is responsible for keeping the back and legs straight and the head upright, even when you are relaxed.
are usually attached to bones.are responsible for voluntary movements.
are sometimes called striated muscles.
Skeletal Muscles:
Smooth muscles:are usually not under voluntary control. are spindle-shaped.are not striated. are found in many internal organs and blood vessels.
Cardiac muscle:
is only found in the heart. is striated.
Copyright Pearson Prentice Hall
How Muscles and Bones Interact
Opposing Muscles Contract and Relax
Copyright Pearson Prentice Hall
How Muscles and Bones Interact
Opposing Muscles Contract and Relax
HomeostasisWhat do your muscles do to help maintain your body temperature?ShiveringGoose bumps