lesson 4.1 bone as a living tissue chapter 4: the skeletal system
TRANSCRIPT
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Lesson 4.1
Bone as a Living Tissue
Chapter 4: The Skeletal System
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• functions of the skeletal system• structures and classifications of bones• growth and development of bones• remodeling of bones
Bone as a Living Tissue
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• support– body framework
• protection– surround organs
• movement– muscles pull bones
• storage– minerals
• blood cell formation– red bone marrow in medullary cavity
Functions of the Skeletal System
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• composition of bones– osteocytes–mature bone cells
• organization of bones– Cortical-Dense stiff strong
bone– Trabecular-Spongy flexible
Structures and Classifications of Bones
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• long• short• flat• irregular
Shape Categories of Bones
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Anatomical Structure of Long Bones
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• osteoblasts – build bone tissue
• osteoclasts– break down bone tissue
• bone formation– ossification
Growth and Development of Bones
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• longitudinal growth– epiphyseal plate
• circumferential growth– change in diameter
• adult bone development– aging causes loss of bone mass
Growth and Development of Bones
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• hypertrophy of bones– stronger bones
• atrophy of bones– weaker bones
Remodeling of Bones
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Match these words with 1–4 below: flat, osteocytes, osteoblasts, storage.
1. build bone tissue
2. one example of bone shape
3. a function of the skeletal system
4. mature bone cells
Review and Assessment
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Lesson 4.2
The Axial Skeleton
Chapter 4: The Skeletal System
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• the skull• the vertebral column• the thoracic cage
The Axial Skeleton
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The Axial Skeleton
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• the cranium– surround the brain
• the facial bones– protect the front of the head
The Skull
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• frontal bone• parietal bones (2)• temporal bones (2)• occipital bones (2)• ethmoid bone• sphenoid bone
The Cranium
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• maxillary bones (2)• palatine bones (2)• zygomatic bones (2)• lacrimal bones (2)• nasal bones (2)• vomer • inferior concha bones (2)• mandible
The Facial Bones
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The Cranial and Facial Bones
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• regions of the spine– cervical– thoracic– lumbar– sacrum– coccyx
• curves of the spine– cervical curve– thoracic curve– lumbar curve– sacral curve
The Vertebral Column
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• the vertebral body• the vertebral arch• the transverse processes• the spinous process• the superior and inferior articular processes
Structures of the Vertebrae
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Structures of the Vertebrae
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• lordosis• kyphosis• scoliosis
Abnormal Spinal Curvatures
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• located between vertebrae• shock absorbers• allow flexibility
The Intervertebral Discs
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• sternum– manubrium– body of the sternum– xiphoid process
• ribs– true ribs– false ribs– floating ribs
The Thoracic Cage
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True or False?
1. All ribs are true ribs.
2. The facial bones surround the brain.
3. The sphenoid bone is part of the cranium.
4. There are 4 regions in the spine.
5. Intervertebral discs allow spinal flexibility.
Review and Assessment
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Lesson 4.3
The Appendicular Skeleton
Chapter 4: The Skeletal System
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• the shoulder complex– scapula– clavicle
• the arm– humerus– radius– ulna
The Upper Extremity
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• the wrist and hand– carpals (8)– metacarpals (5)– phalanges (14)
The Upper Extremity
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• the pelvic girdle– ilium– ischium– pubis
• the leg– femur– tibia– fibula– patella
The Lower Extremity
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• the ankle and foot – tarsals (7)– metatarsals (5)– phalanges (14)
The Lower Extremity
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Fill in the blanks with: foot, shoulder complex, humerus, or pelvic girdle.
1. The proximal bone of the arm is the _______________.
2. The tarsals are found in the _______________.
3. The scapula and clavicle make up the _______________.
4. The ilium is part of the _______________.
Review and Assessment
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Lesson 4.4
Joints
Chapter 4: The Skeletal System
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• immovable joints–synarthroses• slightly movable joints–amphiarthroses• freely movable joints–diarthroses
Categories of Joints
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• sutures– skull
• syndesmoses– coracoacromial joint– distal tibiofibular joint
Immovable Joints
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• synchondroses– sternocostal joint– epiphyseal plates
• symphyses– vertebral joints– pubic symphysis
Slightly Movable Joints
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Freely Movable Joints
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• bursae• tendon sheaths• articular tissues
– articular fibrocartilage– tendons– ligaments
Freely Movable Joint Structures
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Match these words with 1–4 below: skull, diarthroses, amphiarthroses, synarthroses.
1. immovable joint
2. slightly movable joint
3. freely movable joint
4. sutures
Review and Assessment