2. Objectives:
Describe
the two forms of bone tissues
Differentiate
marrow
red marrow from yellow
Describe
the process of bone formation
Describe
how bone grows
Explain
the importance of calcium in
one’s diet
3. Introduction:
How are your bones formed? When you were still inside
your mother’s womb, you did not have bones as you have
now. A special tissue called cartilage made up most of
your skeletal system.
The tissue is the softer version of the hard bone. As we grow
up, the cartilage became harder and harder, thereby
forming your bones. This process of bone formation is
called ossification.
During ossification, calcium compounds get deposited
between the bone cell, causing the bones to become
stronger. Ossification is complete at the age of 20.
4. Two types of bone tissue:
Cancellous bone is located at the ends of
bones. This type of bone is full of holes, like a
sponge, which is why it is also called spongy
bone.
Compact bone is dense and heavy. This type of
bone is solid, strong and cannot be bent. This
bones can be found at the middle part of long
bones.
5. Bone marrows:
Have you ever eaten bulalo? Do you enjoy sipping on the
bones and eating the soft part inside the hollow part of the
bone? This is the bone marrow, a blood-foming tissue.
Red marrow: found in spongy bones and in vertebrae,
ribs, breast bone and pelvis. It is where blood cells are
produced.
Yellow marrow: found at the hollow part of long bones. It
is made up of fat cells and serves as storage deposit for
fat.
Although it generally does not produce blood cells, the
yellow marrow helps the red marrow produce blood cells
when a person bleeds excessively and needs more blood
fast.
6. Helps your bone grow
When a bone grows longer, the growth occurs
at the ends of the bone. Bones grow wider when
a new bone tissues are deposited under the
dense connective tissue surrounding the bone.
Calcium compounds like calcium carbonate
and calcium phosphate are also needed in
bone growth.
7. Did you know about this?
The skeleton of sea urchins, corals and even
algae are being used to help people whose
bones have been damaged or diseased. They
are so porous(full of tiny holed) the new bone
tissue can enter the holes, forming a strong and
durable bond between the bone and the
implant. This characteristics makes them better
replacement than man-made materials.
