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Epithelial Tissue Worksheet Answers Key, Exercises of Histology

A complete table with all information on epithelial tissue

Typology: Exercises

2020/2021

Uploaded on 04/20/2021

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Chapter 4 Histology (Tissues) Name: Key_________________________ Block: ____
Epithelial Tissues:
Cell
Arrangement
Shape
Description
Function
Location
Simple
Squamous
Flat
Irregular Shape
Oval Nuclei
Single Layer
Diffusion
Filtration
Air sacs of lungs (Alveoli)
Blood vessels of kidneys
Cuboidal
Cube-shaped cell
Round nuclei
Single Layer
Secretion
Absorption
Kidney tubules
Ovary surface
Columnar
Tall & thin cells
Oval nuclei
Single layer
Secretion
Absorption
Small intestine
Pseudostratified
Jumbled layers of nuclei
Often with goblet cells
and cilia
Secretion
Absorption
Respiratory passages
(nasal cavity, trachea, &
bronchi)
Stratified
Squamous
2-3 layers
Cuboidal at the base
Squamous at the surface
Outermost cells without
nuclei
Protection from
abrasion
Skin
Mouth
Cuboidal
n/a not covered in our book
Columnar
n/a not covered in our book
Transitional
Five or more layers of
different shaped cells
Dome-shaped at free
surface
As stretched, cells flatten
Stretches
Protects underlying
structures from
caustic effects of urine
Urinary bladder
How Secreted
Glands
Exocrine
Secrete products into
ducts
Several types:
o Unicellular - goblet cells in mucous membranes
o Simple tubular sweat glands & stomach glands
o Simple acinar (or alveolar) sebaceous glands
o Compound tubular duodenal glands
o Compound acinar (or alveolar) - pancreas
Endocrine
Secrete directly into
blood & body fluids
Secretions are called hormones
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Chapter 4 – Histology (Tissues) Name: Key _________________________ Block: ____

Epithelial Tissues:

Cell

Arrangement Shape^ Description^ Function^ Location

Simple

Squamous

 Flat

 Irregular Shape

 Oval Nuclei

 Single Layer

 Diffusion

 Filtration

 Air sacs of lungs (Alveoli)

 Blood vessels of kidneys

Cuboidal

 Cube-shaped cell

 Round nuclei

 Single Layer

 Secretion

 Absorption

 Kidney tubules

 Ovary surface

Columnar

 Tall & thin cells

 Oval nuclei

 Single layer

 Secretion

 Absorption

 Small intestine

Pseudostratified

 Jumbled layers of nuclei

 Often with goblet cells

and cilia

 Secretion

 Absorption

 Respiratory passages

(nasal cavity, trachea, &

bronchi)

Stratified

Squamous

 2 - 3 layers

 Cuboidal at the base

 Squamous at the surface

 Outermost cells without

nuclei

 Protection from

abrasion

 Skin

 Mouth

Cuboidal n/a – not covered in our book

Columnar n/a – not covered in our book

Transitional

 Five or more layers of

different shaped cells

 Dome-shaped at free

surface

 As stretched, cells flatten

 Stretches

 Protects underlying

structures from

caustic effects of urine

 Urinary bladder

How Secreted

Glands

Exocrine

 Secrete products into

ducts

 Several types:

o Unicellular - goblet cells in mucous membranes

o Simple tubular – sweat glands & stomach glands

o Simple acinar (or alveolar) – sebaceous glands

o Compound tubular – duodenal glands

o Compound acinar (or alveolar) - pancreas

Endocrine

 Secrete directly into

blood & body fluids

 Secretions are called hormones

Connective Tissues:

Type Description Function Location

Loose (Areolar)

 Gel-like matrix  Contains fibroblasts, collagen & elastic fibers  Diffusion  Cushions organs (fills spaces  Beneath epithelial tissue

Adipose

 Contains collagen & elastic fibers  Nuclei pushed to the side  Irregular shaped  Fat (energy) storage  Pads & protects parts of the body  Acts as a thermal insulator  Beneath skin  Around joints  Around internal organs

Cartilage

Hyaline

 White  Abundant collagen fibers  Support  Ends of bones  Respiratory passages  Tip of nose

Elastic

 Matrix of elastic fibers  Shape maintenance  Flexibility  Outer ear  Parts of larynx

Fibrocartilage

 Abundant collagen fibers  Tough  Shock-absorption  Intervertebral disks  Knees  Pelvic girdles

Bone

 Rigid  Contains mineral salts & collagen  Support  Protection  Forms muscle attachments  Blood cell formation  Throughout body: skeleton

Blood

 Contains 3 components: red cells, white cells, and platelets in liquid plasma  Transportation of: o Nutrients o Wastes o Gases  Heart  Blood vessels

Muscle Tissues:

Type Type of Control Description Function Location

Skeletal Voluntary  Long, thin fibers with

many nuclei and striations  Move bones  Attached to bones

Smooth Involuntary  Spindle shaped cells with

one centrally located nucleus, lacks striations  Move substances through passageways (i.e. food, urine, etc.)  Constriction of blood vessels  Walls of visceral hollow organs  Irises of eyes  Walls of blood vessels

Cardiac Involuntary  A network of striated

cells with one centrally located nucleus attached by intercalated disks  Pump blood to lungs & body  heart

Nervous Tissues:

Type Description Function Location

Nervous Consists of neurons &^ support cells

(neuroglia) Nerve Cells – consist of cell body, axons, & dendrites  conduct electrical signals for coordination & control of many body activities  brain  spinal column  nerves