Osseous Tissue- Chapter 6 Flashcards
(35 cards)
How many bones are in the body
206
80-Axial
126-Appendicular
What are the functions of the skeletal system
- Support
- Storage of minerals
- Blood cell formation
- Protection
- Leverage
Flat bones?
Craninal bones/ribs
Sutural bones?
Cranium
Long bones?
Long and slender.Fermur
Irregular bones?
Vertabrae
Seasmoid bones?
Sesame seed; hands/feet
Head of a bones forms part of a _____
Joint
What is the Diaphysis
Elongated part of long bone
What narrow connection is between the head and diaphsis of a long bone
Neck
What connects epiphysis to diaphysis
Metaphysis
Difference between red and yellow marrow
Red-involved with blood cell production
Yellow-adipose tissue, stores energy
What are osteoclasts
Mature bone cells that cannot divide
What is lamallae
Layers of matrix in bone
What are osteoblasts?
Produce new bony matrix
What are osteogenic cells
Stem cells that differintiate into osteoblasts
Whats an osteoclast
Remove and remodel bone matrix
What is the difference between the endosteum and the periosteum
Periosteum- superficial layer of bone
Endosteum- Covers spongy bone and internal canals
What is endochondral ossification
Process transforming hyaline cartilage in the embryo to bone
What are the 7 steps of endochondral ossification
- Cartilage enlarges
- Blood vessels grow around edge of cartilage
- Blood vessels penetrate
- Medullary cavity created
- Capillaries migrate into epiphyses
- Epiphyses fills with spongy bone
- Bone grows in length at epiphyseal plate
What does the epiphyseal plate do
Separates epiphysis from diaphysis
What is epiphyseal closure
Process where epiphyseal cartilage narrows until it disappears and leaves epiphyseal line
What is intramembranous ossification
Bones that form without a cartilage model
What are mesenchymal cells
Cells that secrete Osteoid matrix
