Soc12 - Musculo Skeletal System

Question 1

What are the 5 functions of the skeletal system?

Answer 1

• protection of vital organs
• muscle attachment
• joints for movement
• storing calcium and phosphorus
• red and white blood cell production

Question 2

What bones are in the torso? (5)

Answer 2

• pelvis
• clavacal
• sternum
• scapula
• rib cage

Question 3

What are the bones in the arm? (6)

Answer 3

• radius
• ulna
• phalanges
• humerus
• carpals
• metacarpals

Question 4

What are the bones in the legs? (7)

Answer 4

• femur
• patella
• tibia
• fibula
• tarsals
• metatarsals
• phalanges

Question 5

What are the bones in the spine? (5)

Answer 5

• cervical
• thoracic
• lumbar
• sacrum
• coccyx

Question 6

Long bones

Answer 6

Long bones are larger than they are wide. They don’t have to be big, small bones like finger bones (phalanges) count as long bones. A long bone has a shaft and two ends.

Question 7

Short bones

Answer 7

Short bones are generally the same size in length, width and thickness. The only short bones in the body are the carpals (cuffs) in the wrist and the tarsals (toes) in the foot.

Question 8

Flat bones

Answer 8

Flat bones usually protect organs or offer a good surface for muscles to attach to. For example, the ribs protect the heart and lungs, while the broad scapula has three muscles attached to it. Other flat bones are; scapula, cranium and clavicle.

Question 9

Irregular bones

Answer 9

Irregular bones have odd shapes and vary in function. An example is the vertebrae which helps protect the spinal column and the sacrum which has lots of attachment points.

Question 10

What are the 4 Joints

Answer 10

• ball and socket
• condyloid
• hinge
• pivot

Question 11

What is the ball and socket joint?

Answer 11

The rounded head of a long bone (the ball) fits into a cup-shaped hole (the socket). Both the hip and the shoulder joints are ball and socket joints. With the hip, the long femur fits into the pelvis; with the shoulder, the long humerus fits into the scapula.

Question 12

What is the condyloid joint?

Answer 12

Similiar to the ball and socket joint, but the ball rests against the end of a bone, rather than inside a socket. This allows circular motion.

Question 13

Pivot joints

Answer 13

Allow bones to rotate.

Question 14

Hinge joint

Answer 14

Joint that allows only backward and forward motion - just like the hinge on a door. There are three hinge joints; knee,elbow,ankle.