Question

1. osteoclasts =

part f - joints
match the joint type to its description:
a. fibrous
b. cartilaginous
c. synovial
___ immovable (example: skull sutures)
___ slightly moveable (example: intervertebral discs)
___ freely moveable, most common
part g - synovial joints

1. shoulder and hip (move in all planes) → _______________.
2. elbow and knee (flexion/extension) → _______________.
3. thumb joint (flexion, extension, abduction, adduction, circumduction) → _______________.
4. wrist & knuckles (two degrees of motion) → _______________.
5. radioulnar joint & atlantoaxial joint (rotation) → _______________.

part h - short answer

1. why is water content (25 - 30%) important for bones?
2. explain the difference between the axial and appendicular skeleton.

Explanation:

Fibrous joints are immovable like skull sutures. Cartilaginous joints are slightly moveable such as inter - vertebral discs. Synovial joints are freely moveable and the most common type. For synovial joints, shoulder and hip are ball - and - socket joints moving in all planes. Elbow and knee are hinge joints allowing flexion/extension. Thumb joint is a saddle joint with multiple types of movement. Wrist and knuckles are condyloid joints with two degrees of motion. Radioulnar and atlantoaxial joints are pivot joints allowing rotation. Water content in bones is important for shock absorption, nutrient transport, and maintaining bone flexibility. The axial skeleton consists of the skull, vertebral column, and thoracic cage, providing protection and support for vital organs. The appendicular skeleton includes the bones of the limbs and girdles, enabling movement.

Answer:

Part F:
Immovable (example: skull sutures) - a. Fibrous
Slightly moveable (example: intervertebral discs) - b. Cartilaginous
Freely moveable, most common - c. Synovial
Part G:

1. Shoulder and hip (move in all planes) - Ball - and - socket joint
2. Elbow and knee (flexion/extension) - Hinge joint
3. Thumb joint (flexion, extension, abduction, adduction, circumduction) - Saddle joint
4. Wrist & knuckles (two degrees of motion) - Condyloid joint
5. Radioulnar joint & atlantoaxial joint (rotation) - Pivot joint

Part H:

1. Water content in bones (25 - 30%) is important for shock absorption, facilitating nutrient and waste transport, and maintaining bone flexibility.
2. The axial skeleton includes the skull, vertebral column, and thoracic cage, providing protection and support for vital organs. The appendicular skeleton consists of limb bones and girdles, enabling movement.