WGU AP D312 Lab Questions Sections
3-4
Bone Structure and Classification
Bone Cells and Matrix
Osteocyte cells are entrapped in the bone matrix.
Osteocytes play a crucial role in maintaining bone structure and function.
These cells are connected through small channels in the bone called canaliculi.
Osteocytes are derived from osteoblasts that have become embedded in the bone
matrix.
They are essential for bone remodeling and repair.
Long Bone Structure
The diaphysis (labeled D) in a long bone is mostly comprised of compact bone.
Compact bone provides strength and support to the long bone.
The diaphysis is the shaft of the long bone, primarily composed of tightly packed tissue.
It contains the medullary cavity, which stores bone marrow.
The diaphysis is crucial for weight-bearing and locomotion.
Bone Classification and Anatomy
Irregular shaped bones, like the one labeled D, have complex shapes and functions.
Flat bones, such as those labeled A and B, provide protection and muscle attachment
sites.
The axial skeleton includes the skull, vertebral column, and rib cage.
The appendicular skeleton consists of the bones of the upper and lower limbs.
The sternum, located at the anterior of the chest wall, is crucial for protecting vital
organs.
Human Skeleton and Vertebrae
3-4
Bone Structure and Classification
Bone Cells and Matrix
Osteocyte cells are entrapped in the bone matrix.
Osteocytes play a crucial role in maintaining bone structure and function.
These cells are connected through small channels in the bone called canaliculi.
Osteocytes are derived from osteoblasts that have become embedded in the bone
matrix.
They are essential for bone remodeling and repair.
Long Bone Structure
The diaphysis (labeled D) in a long bone is mostly comprised of compact bone.
Compact bone provides strength and support to the long bone.
The diaphysis is the shaft of the long bone, primarily composed of tightly packed tissue.
It contains the medullary cavity, which stores bone marrow.
The diaphysis is crucial for weight-bearing and locomotion.
Bone Classification and Anatomy
Irregular shaped bones, like the one labeled D, have complex shapes and functions.
Flat bones, such as those labeled A and B, provide protection and muscle attachment
sites.
The axial skeleton includes the skull, vertebral column, and rib cage.
The appendicular skeleton consists of the bones of the upper and lower limbs.
The sternum, located at the anterior of the chest wall, is crucial for protecting vital
organs.
Human Skeleton and Vertebrae
