Bone cells and bone structure
Wed, Feb 10, 2027 · Week 4 · Human Anatomy & Physiology (Human Body Systems)
Today's goal: Describe the major bone cells and contrast compact and spongy bone.
What a finished product looks like
This is a model of the work you should turn in today. Use it to check your own: match the structure and the level of detail, do not copy it. Your data and wording should be your own.
Bone cells (what each one does):
- Osteoblast: builds new bone matrix (think 'b' for build).
- Osteoclast: breaks down and resorbs bone (think 'c' for carve away).
- Osteocyte: a mature cell trapped in the matrix that maintains the bone and senses stress.
- Osteoprogenitor cell: the stem cell that divides to make new osteoblasts.
Compact vs spongy bone: compact bone is dense, organized into osteons, and forms the strong outer shell. Spongy bone is a lattice of trabeculae with red marrow in the spaces; it is lighter and absorbs stress near the ends of long bones.
| Feature | Compact bone | Spongy bone |
|---|---|---|
| Structure | Dense, made of osteons | Lattice of trabeculae |
| Location | Outer shell of bones | Ends of long bones, interior |
| Spaces hold | Few (central canals) | Red bone marrow |
| Main job | Strength and protection | Light support, shock absorption |
Also due today: Add the four bone-cell terms to your medical-terminology word list with the osteo- word part highlighted.
WebXam problem for today's skill
One exam-style question that uses exactly what you practiced today. Try it before you reveal the answer, then read why each choice is right or wrong.
Tap an answer to see the full explanation. Nothing is recorded or graded.