Tissues Part 4 (5) Flashcards
Skin is an example of what type of connective tissue?
Loose Connective tissue, the first type of Connective Tissue Proper
Your achilles tendon is an example of what type of connective tissue?
Dense Connective tissue, the second type of Connective Tissue Proper
What’s the difference between Loose and Dense Connective Tissue?
Loose Tissue has a lot more cells and more ground substance, but FEWER fibers.
Dense Tissue has more fibers, but fewer cells and ground substance.
What are some types of fibers found in your connective tissues?
Elastin (which makes it elastic!)
Collagen (which anchors it in place…that’s the tough stuff)
Reticular (helps hold blood in place)
What is Ground Substance?
A watery substance your cells use for fuel.
What are the 3 types of Loose Tissue?
- Areolar: most common, under epithelial tissue and wrapped around organs; made of loose cells and fibers (elastin & collagen) that hold Ground Substance
- Adipose: fat tissue, mostly made of fat cells called adipocytes, insulates body from cold and stores extra energy for later.
- Reticular: like areolar, but made up of reticular fibers that holds your blood in place in your organs.
What are the 3 types of Dense Tissue?
- Regular: dense, tight bundles of collagen fibers and fibroblast cells. Holds muscles to bones, etc.
- Irregular: thick, webbed networks of collagen fibers and cells that help in places that might get pulled in lots of directions. For instance, the dermis under your skin.
- Elastic: made of stretchy material for places that need to stretch and bend…like spine, blood vessels, etc.
What is cartilage?
- Gristly (like what you see on the end of a chicken bone)
- Has no blood or nerves
- Strong against compression AND pulling (tension)
What are the 3 types of cartilage?
- Hyalin: glassy-looking, made of sticky, starchy proteoglycans. Flexible but not stretchy (found in nose, for example)
- Elastic: Made of elastin fibers, strong but also stretchy (ears, for example)
- Fibro: Made of collagen fibers, shock absorbing (like between your spine’s vertebrae)
What are the 2 types of bone tissue?
- Spongy: strong and porous, inside bones, place where marrow is made and stored for your body to make blood from.
- Compact: dense, no spaces, forms outside bone layers and stores calcium for making more bone tissue
What makes blood a connective tissue?
- It connects parts of your body by delivering goods different places
- Helps some body parts be more rigid (by clotting when you get scraped, for example)
What are the 3 types of blood cells?
- Erythrocytes: red cells, the delivery boys
- Leukocytes: larger white cells, infection fighters
- Platelets: small cell fragments that help blood clot
How is blood different than other connective tissues?
It doesn’t have fibers. Instead, it has protein dissolved in the plasma that create fibers when your blood needs to clot.
What is the ground substance in blood called?
Plasma.
