tissue slides lab practical review human biology

TISSUE SLIDES

Lab Practical Review

Human Biology

Epithelial Tissue

Simple Squamous Outer layer of skin aka “epidermis”

Simple SquamousCheek Cell Smear

Lung tissue is simple squamous for gas exchange!

Simple Squamous

Stratified Squamous(more than one layer of cells)

Stratified Squamous

Simple CuboidalSingle layer of “square” cells

Cuboidal cells are designed to secrete, like those found in the

kidneys

Simple Cuboidal

Transitional epithelium includes squamous and cuboidal cells.

• This tissue is found in the bladder and other organs that are designed to stretch!

Simple Columnar In the small intestine (jejunum)

• Columnar cells ABSORB, ABSORB, ABSORB!!

• What do they absorb in the intestines?

Pseudostratified columnar cells can also have cilia, like in the trachea.

The cilia are hair-like structures that . . .

• AID IN MOVING SUBSTANCES like mucus, dust, and foreign particles

Connective TissueAdipose (Fat Cells)

Adipose

Hyaline Cartilage(Chondrocytes)

• Found in the rib cage• Allows expansion of

lungs while breathing

Hyaline Cartilage

Elastic Cartilage(Chondrocytes)

• This is the bendable cartilage found in the ears.

Bone (Osteocytes)

Bone

Blood(Erythrocytes and Leukocytes)

Muscle TissueAll cells are called fibers!

Smooth

• Smooth muscle is stringy

• Found in all major organs

• Involuntary with one nucleus per cell

Smooth Muscle

Skeletal Muscle

• Has striations that make the fibers appear banded

• Tissue is voluntary and attached to bones

• Several nuclei per fiber

Skeletal Muscle

Cardiac Muscle

• Fibers have striations but are also branched

• Tissue is involuntary and found in the heart

• One nucleus per fiber

Cardiac Muscle

Nervous TissueAll tissue is made of neurons.

• Neurons appear as star-shaped cells in the brain (cerebrum and cerebellum) and the spinal cord

Nerve Cells