Functions Of Skelatal System

Question 1

Support

Answer 1

The skeleton forms a rigid framework to which are attached to the softer tissues and organs of the body.

Question 2

Protection

Answer 2

The skull and vertebral the central nervous system, the rib cage protects the heart and lungs and the pelvic girdle supports and protects the pelvic viscera. (Reproductive glands)

Question 3

Movement

Answer 3

Bones serve as anchoring attachments for skeletal muscle. In this capacity, the bones act as levers with joints functioning as pivot axes when muscles contract it causes body movement.

Question 4

Hemopoiesis

Answer 4

The red bone marrow of an adult, produces white blood cells, red blood cells and platelets. It is estimated that an average of one million red blood cells are produced every second by the bone marrow to replace those that are worn out and destroyed by the live.

Question 5

Mineral storage

Answer 5

The inorganic matrix of bone is composed by primary minerals like calcium and phosphorus. These minerals give bone its rigidity and account for 2/3 of the weight of bones. 99% of the calcium and 90% of the phosphorus within the body are deposited in bones and teeth. Calcium is necessary for muscle contraction, blood clotting, and are used in cell membranes. Phosphorus is required by activities of DNA, RNA, and ATP vitalization.

Question 6

Long bones

Answer 6

Are longer than they are wide. Function as levers. Most of body in the upper and lower extremities are long bones. (Femur and humerus)

Question 7

Short bones

Answer 7

Somewhat cube shaped and are found in contained spaces where they transfer forces. (The wrist and ankle)

Question 8

Flat bones

Answer 8

Bones that have a broad dense surface for muscle attach,ent or protection of underlying organs. (Rubs, shoulder girdle, cranium)

Question 9

Flat bones

Answer 9

Bones that have a broad dense surface for muscle attach,ent or protection of underlying organs. (Rubs, shoulder girdle, cranium)

Question 10

Irregular bones

Answer 10

Vary in shape, have many surface markings for muscle attachment or articulation. —> joints. (Vertebrae + certain bones of the skull).

Question 11

Axial skeleton

Answer 11

Consists of the bones that form the axis of the body and support and protect the organs of the head, neck, and torso.

Question 12

Appendicular skeleton

Answer 12

Composed of the bones of the upper and lower extremities and the boney girdles, which anchor the appendages to the axial skeleton.

Question 13

How many bones in the skeletal system

Answer 13

206

Question 14

Axial system bones

Answer 14

80 bones

Question 15

Breakdown of axial system

Answer 15

Skull - 22 bones
Middle ear - 6 bones
Hyoid - 1 bone
Vertebral column - 26 bones
Rib cage - 25 bones

Question 16

Appendicular bones

Answer 16

126 bones

Question 17

Breakdown of appendicular bones

Answer 17

Pectoral girdle - 4 bones
Upper extremities - 60 bones
* humerus - 2 bones
* radius - 2 bones
* ulna - 2 bones
* carpals - 16 bones
* metacarpals - 10 bones
* phalanges - 28 bones
Pelvic girdle - 2 bones