Skeletal System

Question 1

Functions of the Skeleton

Answer 1

1: To give shape and support to the body (posture)
2: To allow movement of the body
3: To give protection to the internal organs
4: To produce blood (rbc +wbc)
5: To store minerals (eg. Iron)

Question 2

Definition of a Synovial Joint

Answer 2

A freely movable joint in which the bones’ surfaces are covered by articular cartilage, and connected by a joint capsule lined with synovial fluid.

Question 3

Uses of blood cell Production

Answer 3

-Rbc transport oxygen and remove CO2
-Wbc fight infection and disease
-Platelets repair skin cells after injury

Question 4

Definition of Joint

Answer 4

A place when two or more bones meet and are held together by ligaments.

Question 5

Three Classes of Joint

Answer 5

1) Fibrous (immovable)
2) Cartilaginous (slightly moveable)
3) Synovial (freely movable)

Question 6

Types of Synovial Joint

Answer 6

1) Hinge Joint (eg. Knee)
2) Ball + Socket Joint (eg. Shoulder)

Question 7

Hinge Joint

Answer 7

-Only allows flexion and extension movement
-Found at the knee and elbow
-Articulating Bones (bones that come together to form a joint)

Question 8

Ball and Socket Joint

Answer 8

-Allows movement in all directions
-Where the rounded end of one bone fits inside the cup-shaped end of another bone
-Found at shoulder and hip

Question 9

Types of movement

Answer 9

Flexion: Closing the joint
Extension: Opening the joint
Abduction: Away from the body
Adduction: Towards the body
Rotation: Circular joint action
Circumduction: Combination of abduction, adduction and rotation.

Question 10

Bones in the Leg (top to bottom)

Answer 10

Femur
Patella
Tibia (front)
Fibula (back)
Talus
Calcaneum (heel)
Tarsals
Metatarsals
Phalanges

Question 11

Bones in the Arm

Answer 11

Humerus
Radius (thumb-side)
Ulna (pinkie-side)
Carpals
Metacarpals
Phalanges

Question 12

Bones in the Head to Hips

Answer 12

Cranium
Clavicle
Scapula
Sternum
Ribs
Vertebral Column
Ilium
Sacrum
Pubis