Skeletal System 8 Spongy Bone + Bone Marrow

Question 1

Define Tribecular Bone/Spongy Bone:

Answer 1

Loosly organized osteous tissue

Cells + bone matrix form a Trabecylae - thin spikes of bone that form an open network

Location: Metaphysis + Epithysis

Contains: Osteocytes + bone matrix arranged in lamellae layers

Question 2

Function of Spongy Bone:

Answer 2

Provide strength w/out additional weight

Store bone marrow

Question 3

Define Bone Marrow:

Answer 3

Tissue that occupies the medullary Cavities

Question 4

The 2 kinds of Bone Marrow:

Answer 4

Red Bone Marrow + Yellow Bone Marrow

Question 5

Define Red Bone Marrow:

Answer 5

Cells: Blood stem cells
Function: Produce white + red blood cells

In infants red bone marrow is in all bones
in adults most of it turns into yellow bone marrow

Question 6

In adults Red Bone Marrow is only found where:

Answer 6

Skull

Vertebrae

Ribs

Sternum

Hips

Proximal Apithysis Humerus Femur

Question 7

Define Yellow Bone Marrow:

Answer 7

Cells: Adipocytes (fat cells)

Function: Stores lipids

Location: In adults, all medullary cavities of extremities

Except proximal ends of humerus + femur