Soc12 Skeletal System

Question 1

What are the 5 functions of the skeletal system?

Answer 1

Protection of vital organs, muscle attachement, joints for movement, storing calcium and phosphorus, producing red and white blood cells.

Question 2

What are the bones of the torso (5)?

Answer 2

Scapula, clavical, sternum, rib cage, pelvis.

Question 3

What are the bones of the arm (6)?

Answer 3

Ulna, radius, carples, metacarples, phalanges and humerous.

Question 4

What are the bones in the legs (7)?

Answer 4

Femur, tibia, fibula, patella, tarsals, metatarsals, phalanges.

Question 5

What are the bones in the spine (5) and how many vertibrae does each bone have?

Answer 5

Cervical (7), thoracic (12), lumbar (5), sacrum (5 fused) and coccyx (4 fused)

Question 6

What are the bones in the head? (2)

Answer 6

Cranium and the mandible.

Question 7

Irrelgular bones

Answer 7

Irregular bones have odd shapes and vary in function. Eg vertibrae. Protect vital organs

Question 8

Flat bones

Answer 8

Flat bones usually protect organs or offer a good surface for muscles to attach onto. Eg scapula, cranium patella and clavicle.

Question 9

Short bones

Answer 9

Short bones are generally the same size in length, width and thickness. The only short bones are the carpals and the tarsals. They are for weight bearing.

Question 10

Long bones

Answer 10

Long bones are longer than they are wide. A long bone has a shaft and two ends. Long bones don’t have to be long becuase the phalanges (in the fingers) are long bones. A femur is also a long bone. Allows movement

Question 11

What are the 5 functions of the sleletal system?

Answer 11

Protecting vital organs, provides muscle attachment, provides joints for movement, storing calcium and phosphorus and produces white and red blood cells.

Question 12

What are the 4 bone classifications?

Answer 12

Short, long, flat and irregular

Question 13

What are the 4 joints?

Answer 13

Ball and socket joints, hinge joints, condyloid joints and pivot joints

Question 14

What is a ball and socket joint and example?

Answer 14

Rounded head of a long bone fits into a cupped shaped hole (the socket). The hip and shoulder joints are ball and socket joints.

Question 15

What is a hinge joint and an example?

Answer 15

A hinge joints allows backward and forward motion like a bicep curl or a hinge on a door. There are 3 hinge joints the elbow, the knee and ankle.

Question 16

What are condyloid joints and an example?

Answer 16

Condyloid joints is like a ball and socket joint but the ball rests against the head of a bone rather than a socket. This provides circular motion in places like the wrist.

Question 17

What is a pivot jont and example?

Answer 17

A pivot joint allows bones to rotate. One cyclindrical shaped bone rotates another bone ligament that makes a ring round it. There are 3 pivot points in the body the elbow, wrist and neck. In the neck the axel and the axis are the first two vertibrae that allow movement.