DE BIO 141 Chapter 6 - Skeletal System
Chapter Overview
-Bone structure
-Bone formation
-Bone function
-Bone vocabulary and identification
-Bone injury
TOPIC 6.1 - bone structure and classification
General Skeletal Functions
- Protection
- Movement
- Calcium homeostasis
- Mineral storage
- Hematopoiesis
Bone Basics
- A normal adult skeleton will be seen it 206 bones
- Particular individuals have more or less bones depending on birth defects or growth
patterns
Some of the defects are known as
- Skeletal dysplasia - a genetic disorder (very rare) that causes the
abnormal growth and development of baby's bones, cartilage, and
joins
- Hypochondrogenesis - a severe genetic disorder characterized by
smaller limbs and underdevelopment of the spine and pelvis
- Osteogenesis Imperfecta - a genetic disorder which results in
imperfect bone growth, usually the bones are much easier to
break or fracture
- Key cell types include
-Osteocytes - bone cells
-Osteoblasts - bone making cells
-Osteoclasts - bone destroying cells
