[LAB] Epithelial Tissue And Connective Tissue

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12 Terms

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Simple squamous epithelium

Simple - single-layered

Epithelium - covers or lines free, unattached surfaces (free space)

Squamous - flatter, disk shaped cells

Oval shaped nucleus

<ul><li><p>Simple - single-layered</p></li></ul><p></p><ul><li><p>Epithelium - covers or lines free, unattached surfaces (free space)</p></li></ul><p></p><ul><li><p>Squamous - flatter, disk shaped cells</p></li></ul><p></p><ul><li><p>Oval shaped nucleus</p></li></ul><p></p>

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Simple cuboidal epithelium

Simple - single-layered

Epithelium - covers or lines free, unattached surfaces (free space)

Cuboidal - shaped like rounded squares

Nucleus is near the center of the cell

<ul><li><p>Simple - single-layered</p></li></ul><p></p><ul><li><p>Epithelium - covers or lines free, unattached surfaces (free space)</p></li></ul><p></p><ul><li><p>Cuboidal - shaped like rounded squares</p></li></ul><p></p><ul><li><p>Nucleus is near the center of the cell</p></li></ul><p></p>

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<p>Simple columnar epithelium - <span style="color: red;"><strong>NO CILIA</strong></span></p>

Simple columnar epithelium - NO CILIA

Simple - single-layered

Epithelium - covers or lines free, unattached surfaces (free space)

Tall and narrow

Nucleus is oval-shaped and is near the base of the cell

Contains goblet cells that hold mucus

NO CILIA

<ul><li><p>Simple - single-layered</p></li></ul><p></p><ul><li><p>Epithelium - covers or lines free, unattached surfaces (free space)</p></li></ul><p></p><ul><li><p>Tall and narrow</p></li></ul><p></p><ul><li><p>Nucleus is oval-shaped and is near the base of the cell</p></li></ul><p></p><ul><li><p>Contains goblet cells that hold mucus</p></li></ul><p></p><p><span style="color: red;"><strong>NO CILIA</strong></span></p>

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<p>Pseudostratified columnar epithelium - <span style="color: red;"><strong>YES CILIA</strong></span></p>

Pseudostratified columnar epithelium - YES CILIA

Pseudostratified - appears to have many layers but is actually single-layered

Epithelium - covers or lines free, unattached surfaces (free space)

Tall and narrow

Contains goblet cells that hold mucus and DOES CONTAIN CILIA

<ul><li><p>Pseudostratified - appears to have many layers but is actually single-layered</p></li></ul><p></p><ul><li><p>Epithelium - covers or lines free, unattached surfaces (free space)</p></li></ul><p></p><ul><li><p>Tall and narrow</p></li></ul><p></p><p>Contains goblet cells that hold mucus and <span style="color: red;"><strong>DOES CONTAIN CILIA</strong></span></p><p></p>

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<p>Stratified squamous epithelium - <strong>keratinized</strong></p>

Stratified squamous epithelium - keratinized

Stratified - multi-layered

Squamous - flatter, disk shaped cells

Epithelium - covers or lines free, unattached surfaces (free space)

Keratinized - exposed to the outside world; palms of hand and soles of feet

These cells can be found on the skin in the form of several layers of dead skin cells which keeps us hydrated

No nuclei present in the dead cells

The cells get flatter towards the surface of the skin

<ul><li><p>Stratified - multi-layered</p></li></ul><p></p><ul><li><p>Squamous - flatter, disk shaped cells</p></li></ul><p></p><ul><li><p>Epithelium - covers or lines free, unattached surfaces (free space)</p></li></ul><p></p><ul><li><p><strong>Keratinized </strong>- exposed to the outside world; palms of hand and soles of feet</p></li></ul><p></p><p>These cells can be found on the skin in the form of several layers of dead skin cells which keeps us hydrated</p><p></p><p>No nuclei present in the dead cells</p><p></p><p>The cells get flatter towards the surface of the skin</p>

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<p>Stratified squamous epithelium - <strong>nonkeratinized</strong></p>

Stratified squamous epithelium - nonkeratinized

Stratified - multi-layered

Squamous - flatter, disk shaped cells

Epithelium - covers or lines free, unattached surfaces (free space)

Nonkeratinized - exposed to the outside world, but in a moist environment; cheek cells in the mouth, esophagus

These cells are living and nuclei are present

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<p>Areolar connective tissue - <strong>FOUND IN THE DERMIS</strong></p>

Areolar connective tissue - FOUND IN THE DERMIS

Areolar - contains lots of fibers

Connective tissue - no free space

Makes up stretchy parts of the body like skin

Cells usually do not come into contact with each other

The dark red spots are the nuclei of the cells that are responsible for creating all the messy fibers visible in the images

<ul><li><p>Areolar - contains lots of fibers</p></li></ul><p></p><ul><li><p>Connective tissue - no free space</p></li></ul><p></p><ul><li><p>Makes up stretchy parts of the body like skin</p></li></ul><p></p><ul><li><p>Cells usually do not come into contact with each other</p></li></ul><p></p><ul><li><p>The dark red spots are the nuclei of the cells that are responsible for creating all the messy fibers visible in the images</p></li></ul><p></p>

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<p>Adipose tissue - <strong>FOUND IN THE HYPODERMIS</strong></p>

Adipose tissue - FOUND IN THE HYPODERMIS

Adipose - cells containing fat molecules

Connective tissue - no free space

The cells contain very little amounts of cytoplasm, but many fat molecules

The darker purple dots are the nuclei of the adipocytes (cloud-like images)

<ul><li><p>Adipose - cells containing fat molecules</p></li></ul><p></p><ul><li><p>Connective tissue - no free space</p></li></ul><p></p><ul><li><p>The cells contain very little amounts of cytoplasm, but many fat molecules</p></li></ul><p></p><ul><li><p>The darker purple dots are the nuclei of the adipocytes (cloud-like images)</p></li></ul><p></p>

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<p>Dense <strong>regular </strong>connective tissue</p>

Dense regular connective tissue

Wave-like pattern that is very uniform

Slender nuclei

Found in tendons and ligaments
- Tendons - connect muscle to bone
- Ligaments - connect bone to bone

<ul><li><p>Wave-like pattern that is very uniform</p></li></ul><p></p><ul><li><p>Slender nuclei</p></li></ul><p></p><ul><li><p>Found in tendons and ligaments</p><ul><li><p>Tendons - connect muscle to bone</p></li><li><p>Ligaments - connect bone to bone</p></li></ul></li></ul><p></p>

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<p>Dense <strong>irregular </strong>connective tissue - <strong>FOUND IN THE DERMIS</strong></p>

Dense irregular connective tissue - FOUND IN THE DERMIS

Less wave-like in appearance; much more messy, with fibers running in random directions

Few visible cells

<ul><li><p>Less wave-like in appearance; much more messy, with fibers running in random directions</p></li></ul><p></p><ul><li><p>Few visible cells</p></li></ul><p></p>

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What tissues are present in this photo?

Top layer - stratified squamous epithelium; dead skin cells on the epidermis

Middle layer - areolar connective tissue found in the dermal papilla

Bottom layer near the arrow - dense irregular connective tissue, making up the layer of skin known as the dermis

Skin layers from superficial to deep: epidermis » dermis » hypodermis

<p>Top layer - <strong>stratified squamous epithelium</strong>; dead skin cells on the epidermis</p><p></p><p>Middle layer - <strong>areolar connective tissue</strong> found in the dermal papilla</p><p></p><p>Bottom layer near the arrow - <strong>dense irregular connective tissue</strong>, making up the layer of skin known as the dermis</p><p></p><p>Skin layers from superficial to deep: epidermis » dermis » hypodermis</p>

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What tissues are present in this photo?

Blue arrow - stratified squamous epithelium; dead skin cells on the epidermis

Red arrows - areolar connective tissue found in the dermal papilla

Green arrow - dense irregular connective tissue, making up the layer of the skin known as the dermis

Skin layers from superficial to deep: epidermis » dermis » hypodermis