Skeletal System Bone is as strong as ____ and 4 times stronger than the same amount of reinforced _____!. General Info. Organs called bones Adult human has ___ bones. Functions of Bones. _______ Supports muscle, fat and skin Protection Surrounds vital organs EX: skull, ribs, pelvis
and the bones of the wrist and ankle.
very short – how can this be?
Above: Note the relationship btwn the compact and spongy bone.
Below:Close up of spongy bone.
Note the gross differences between the spongy bone and the compact bone in the above photo.
Do you see the trabeculae?
The blue arrows indicate the osteoblasts. The yellow arrows indicate the bone matrix they’ve just secreted.
Yellow arrows indicate osteocytes – notice how they are surrounded by the pinkish bone matrix.
Blue arrow shows an osteoblast in the process of becoming an osteocyte.
On the right, notice how the osteocyte is “trapped” within the pink matrix
Here, we see a cartoon showing all 3 cell types. Osteoblasts and osteoclasts are indicated.
a. Has been ___________
b. Has had its organic component removed
The diagram below represents a long bone shaft in cross-section. Each yellow circle represents an osteon. The blue represents additional matrix filling in the space btwn osteons. The white in the middle is the marrow cavity.Microscopic Structure of Compact Bone
Notice the red marrow and the compact bone
Note the compact bone on the bottom and marrow on the bottom.
At puberty, growth in bone length is increased dramatically by the combined activities of growth hormone, thyroid hormone, and the sex hormones.
side-to-side, lateral curve
Why doesn't a skeleton play music in a church?
He has no organ
What does a skeleton order at a restaurant?