Animal Tissues - Zoology - Lab Slides, Slides for Zoology. National Institute of Industrial Engineering
nazi
nazi7 January 2013

Animal Tissues - Zoology - Lab Slides, Slides for Zoology. National Institute of Industrial Engineering

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Its the important key points of lab slides of Zoology are:Animal Tissues, Malpighian Tubules, Gas Exchange, Fish Gills, Bird Flight Muscles, Simple Squamous Epithelium, Hyaline Cartilage, Lung Alveoli, Vagus Nerve Consis...
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Slide 1

ANIMAL TISSUES

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Why waste time on histology at the

beginning of a zoology course?

If we don’t …. how do we talk about …

- the function of insect Malpighian tubules?

- gas exchange in fish gills?

- bird flight muscles?

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Zoology lectures will involve observations such as …..

“The mammalian diaphragm is a sheet of skeletal muscle”

“The vagus nerve consists of bundles of axons”

“Lung alveoli consist of simple squamous epithelium”

“Shark skeletons are dominated by hyaline cartilage”

Not everyone is up to speed on animal tissues

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ANIMAL TISSUES

Cells are not usually isolated -- instead they're

surrounded by other similar cells: TISSUE.

What are tissues??

DEF: Group of similar cells & intercellular substance

functioning together to perform a specialized activity.

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Study of tissues: HISTOLOGY

Histio = “tissue”

Logos = “study of”

All animal tissue can be place in 1 of 4 types.

What are the 4 types??

1) epithelial

2) connective

3) muscle

4) nervous

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EPITHELIAL TISSUE

2 locations: a) glands

b) covering surfaces

* external (e.g., skin)

* lining “lumens” (e.g., stomach)

Organized in continuous layers ..... thin to thick.

Tightly packed .... little intercellular material.

All epithelial are anchored by a basement membrane.

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DEF: Group of similar cells & intercellular

substance functioning together to perform a

specialized activity.

Epithelia

mostly minimal

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Rules for Naming Epithelia are based on…

Number of cell layers

Simple (1 layer)

Stratified (2 or more layers)

Cell shape

Squamous

Cuboidal

Columnar

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Simple squamous epithelium

Simple columnar epithelium

Stratified squamous epithelium

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Some epithelia are simple squamous … others are

heavily stratified.

Why does this make sense?

Examples??

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Simple Squamous

Epithelia

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L

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SMALL INTESTINE LINING

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* *

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Stratum Corneum

Human

Skin

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Human Skin

White

Black

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CONNECTIVE TISSUE

Most abundant tissue in body.

- Binds (ligaments)

- Supports (mesenteries)

- Protects (bone)

Does not occur on free surfaces (like epithelia).

Cells are few ..... fibroblast is a common example.

“Matrix” is abundant.

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DEF: Group of similar cells & intercellular

substance functioning together to perform a

specialized activity.

few much

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