Muscoskeletal System

Question 1

Sketeleton functions

Answer 1

Provide body with rate work
Gives attachment to muscles and tendons
Allow movement of body
Haemolysis production of blood cells in red body marrow

Question 2

Bone tissue types

Answer 2

Spongy - porous highly vascularised reduces bone density
Compact - makes up hard outer layer contains nerves and blood vessels made up of parallel tubed units called osteons

Question 3

Long bones structure

Answer 3

Diaphysis - compact bone
2 epiphyses - outer covering of compact bone with spongy bones no inside
Outer layer - tough to protect bone
Inner layer - contains bone cells for bone production and breakdown repair remodelling

Question 4

Osteoblasts

Answer 4

Bone forming cell
Present where the bone is growing repairing or remodelling
E.g site of fracture
Differentiate into osteocytes

Question 5

Osteocytes

Answer 5

Mature Bon cels
Monitor and maintain bone tissue

Question 6

Osteoclasts

Answer 6

Break down bone releasing calcium and phosphate
Found in areas of bone where there is active growth repair or remodelling

Question 7

Osteogenesis

Answer 7

1.. osteoblasts secrete osteoblasts which gradual replace initial cartilage model
Osteoblasts lay down calcium and phosphate slats through the osteoid progressively calcifying it and converting it to the hard rigid structure of mature bone
3. As the bone rows the osteoblasts become trapped in the matrix of their own making and become osteocytes.

Question 8

Ossification

Answer 8

Bone starts as cartilage
Starts in centre then outwards as it continues diaphysis lengthens
Blood supply blood vessels and nervous tissue helps growth of compact Bone in ephiphyses
Spongy bone growth is stimulated by transformation of osteocytes into a matrix becoming osteoblasts as we age the osteoblasts at the end of the bone (epiphyses) and compact bone forms a strong tough outer.