Histology: Tissues and Epithelial Tissue

Topics: Tissues, Muscle, Connective tissue Pages: 5 (503 words) Published: June 15, 2014


Histology
Laszlo Vass, Ed.D. Version 42-0013-00-01

Lab Report Assistant
Purpose

What is the purpose of this exercise?

Are there any safety concerns associated with this exercise? If so, list what they are and what precautions should be taken.

Exercise 1: Epithelial Tissue

Data Table 1: Epithelial Tissue Observations
TISSUE TYPE
OBSERVATIONS

Simple Squamous
Single layer flat large circular skin cells.

Simple Cuboidal
Thicker cube like still in single layer appear much smaller.

Simple Columnar (stomach)
Oblong

Simple Columnar (duodenum)

Stratified Squamous (keratinized)
Cells are small and appear flat and stack on top of the others.

Stratified Squamous (non-keratinized)
Not as flat and nuclei are visible in the stacks.

Pseudostratified Ciliated Columnar
The way the columnar cells fit together make them appear stacked. Cilia is visible at the surface.

Transitional
Appears columnar and stacked on top of each other.

Stratified Cuboidal (online)
Online picture has larger cube shaped cells.

Stratified Columnar (online)
Stacked and column like in appearance.

Questions

A. Why is the study of histology important in the overall understanding of anatomy and physiology?

B. How are epithelial tissues named?

C. Why are some epithelial tissues stratified?

D. Unlike squamous cells, cuboidal and columnar cells have large, open cytoplasm. Which functions of epithelial tissue are supported by having such big cells?

E. Look at the following drawings and identify each type of epithelial tissue:

1.

2.

3.

4.

Exercise 2: Connective Tissue
obseRvations

Data Table 2: Connective Tissue

Tissue
Amount and Shape of
Cells
Amount of
Matrix
Are there fibers? If so,
are they parallel or
scattered?
Mesenchyme (online)

Aerolar (online)

Adipose (online)

Dense Irregular (online)

Reticular

Dense Regular: Tendon

Hyaline Cartilage

Elastic Cartilage

Fibrocartilage

Compact Bone

Human Blood

Questions

A. What is the primary function of connective tissue?

B. What can the shape of the cells in a particular type of tissue tell about the function of that tissue?

C. What is matrix? Why do some tissues have more matrix than others?

D. What do collagen fibers provide?

E. Tendons, ligaments and cartilage have limited blood supply. Explain how this might affect the ability of these tissues to heal after an injury.

Exercise 3: Muscle Tissue
obseRvations

Data Table 3: Muscle Tissue

Muscle

Shape and Arrangement of Cells
Str ia tions
Present?

Skeletal

Smooth

Cardiac

Questions

A. What kind of muscle would you find in the stomach?

B. How is smooth muscle structure different from that of skeletal and cardiac muscle? C. Why is skeletal muscle voluntary?

D. What is unique about cardiac muscle?

Exercise 4: Nervous Tissue
observations

Make a sketch of the neuron as seen in your microscope slide and label the following: Cell body, nucleus, cell processes and neuroglia.

Questions

A. What is the function of nervous tissue?

B. Why are the cell bodies of neurons elongated into cell processes?

C. If all nerves respond to stimuli, why cannot eyes “hear” sound and ears “see” light?

D. How is a nerve different from a neuron?

Conclusions

Explain the purpose of these exercises and why studying...
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