Skeletal System

Question 1

List down the functions of skeletal system

Answer 1

Body framework - shape and support
Protection of internal organs
Formation of blood cells in bone marrow
Storage of excess calcium

Question 2

List five types of bone and give an example each.

Answer 2

1. Long bones - elongated, slender bones found mainly in the limbs.
2. Short bones - chunky and boxy in shape. Ex, carpals and tarsals.
3. Flat bones - curved and not flat, they are thin with parallel surfaces. Ex, ribs and sternum.
4. Irregular bones - complex shapes with multiple processes and projections. Ex, vertebrae.
5. Sesamoid bones - form within a tendon. Ex, patella.

Question 3

Why are bone injury usually very painful?

Answer 3

The sensory nerve supply usually enters the bone at the same site as the nutrient artery, and branches extensively throughout the bone. Bone injury is therefore usually very painful.

Question 4

What are three types of bone cells and its function?

Answer 4

Osteoblasts, bone building cells
Osteocytes, mature bone cells
Osteoclasts, bone reabsorbing cells