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Introduction to Connective Tissue
Introduction to Connective Tissue provides an overview of the various types of connective tissue in the human body including their structure, functions, and healing of injuries. Topics include the classification of connective tissue, the organization and composition of connective tissue cells and fibers, the role of elastic and collagen fibers, ground substances and extracellular matrix, and the healing processes of hemostasis, inflammation, and fibrosis. Through text, illustrations, and photos, students will be able to identify
Transcript
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The fascial system. How many of you have heard of fascia?
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...blank
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Good. This is your connective tissue. This is your connective tissue.
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It's gotten a lot more popular over the last few years.
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A lot more research is being done, but we're going to keep it simple today.
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A ligament.
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A ligament attaches what to what?
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Bone to bone.
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Wait a second, we already saw something that was bone to bone.
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What was that?
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Joints are bone to bone.
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Which means if a ligament attaches bone to bone,
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then it does what?
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Supports joints.
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So we're going to find ligaments at every joint
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because that's what helps keep them together.
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Tendons.
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What do tendons do? Connect what to what?
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Muscle to bone, so generally speaking muscles don't attach to bones.
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Tendons attach to bones.
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So muscles pull on tendons which then moves bones...at a...
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joint
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which is supported by
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ligaments. Just putting it all together.
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This is the Achilles tendon.
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You all know where your Achilles tendon is?
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We'll do a little flash forward here.
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What muscles does the Achilles tendon attach
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to the calcaneus, the heel bone?
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Soleus and gastroc, good.
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The Achilles tendon is a big tendon that takes my calf
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and basically attaches it to my calcaneus.
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Got that?
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Fascia. When we us the term fascia without using the term as a global thing
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usually we're talking about sheets of connective tissue.
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You have things like the epimysium that covers the muscles
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and gives them shape.
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You remember epimysium, endomysium and perimysium?
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I won't quiz you too hard on that.
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But the epimysium is just a big sheet of fascia that shapes muscles.
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This fascia right here
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this very thick fascia, at least that's what I tell people.
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It's not fat, it's just fascia.
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Why would I have connective tissue over this area?
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Yeah, I mean is connective tissue weak or strong stuff?
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Strong. It's not nearly as elastic as muscle tissue.
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Does that make sense?
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You have connective tissue which is a little less elastic,
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a little bit more resistant
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over my abdominal cavity to protect
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maybe my internal organs, that would be probably a good thing.
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We have my internal organs here to protect.
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What is this area of my body lacking
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that this area of my body has?
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Ribs. So my thoracic spine
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is much more stable because of my ribcage and
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all the bony attachments.
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Another thing that this fascia does is
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is it helps protect my lumbar spine a little bit
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by keeping me from doing what?
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Yeah, it helps resist that motion a little bit,
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gives me a little bit more stability.
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There's actually some fascia on the other side too, we saw this picture.
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Anybody know what this is called?
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Your thoracolumbar fascia.
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You have seen that in every picture, I'm not sure you knew it had a name.
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Yeah, that fascia is there for a reason, it helps stabilize the lumbar spine as well.
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Interesting that we have this corset of connective tissue
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where we lack bony support.
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And there's fascia all over the body.
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There is definitely connective tissue all over the body
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supporting us, giving us shape,
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protecting internal organs
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and of course transmitting force.
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A little deeper into our educations, we'll see where some
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some of these fascial sheaths are connections for multiple muscles
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transferring force from one to another.
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Your thoracolumbar fascia,
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connects your glutes to your lats.
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That's an interesting combination of muscles.
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You think that would help transfer force between your
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lower and upper extremity?
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Is that important?
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Sure, do you pull open a door with just your arms?
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