Epithelial,Connective,Epithelial,Connective,Muscle and Nervous Muscle and Nervous

TissuesTissuesChapter 5 in your textbook

What are tissues? What are tissues?

First, what are the levels of organization?

Atoms- Molecules- Cells- Tissues- Organs- Organ systems- Whole organism!!

So using the levels of organization, tissues are made up of what?

CORRECT….. CELLS!!!

All tissues are, are a bunch of the same type of cells together!

4 Different Types of Tissues4 Different Types of Tissues

Does anybody know any of the four?

1. Epithelial Tissue1. Epithelial Tissue2. Connective Tissue2. Connective Tissue3. Muscle Tissue3. Muscle Tissue4. Nervous Tissue4. Nervous Tissue

General Epithelial Tissues1. They are found throughout the body:

covering organs and forming inner linings of body cavities .

2. They are connected to Connective Tissues by the basement membrane.

3. They lack blood vessels. IF they do not have blood vessels how do

you think they receive nutrients?

General Epithelial Tissues

1. They divide rapidly.

2. They are tightly packed together.

3. They are classified according to their layers of cells.

General Epithelial TissuesHow do you think the characteristics we

just listed relate to what epithelial tissues do?

They divide rapidly- how does that help the body?

Injuries can heal rapidly to these tissues, skin and stomach cells are continuallydamaged and replaced quickly.

General Epithelial Tissues

• They are tightly packed- how does this help the cell?

• They form protective barriers in places like the outer skin, and your mouth.

Simple:Simple: composed of a single layer of cells.

Stratified:Stratified: those with two or more layers of cells.

Squamous:Squamous: Flattened cells. Cuboidal:Cuboidal: Those with cubed shaped cells. Columnar:Columnar: Elongated cells.

TYPES OF EPITHELIAL CELLS: TYPES OF EPITHELIAL CELLS: Classified by layersClassified by layers

Some examples of what Some examples of what Epithelial cells may look like: Epithelial cells may look like:

Some examples of what Some examples of what Epithelial cells may look like: Epithelial cells may look like:

Some examples of what Some examples of what Epithelial cells may look like: Epithelial cells may look like:

Some examples of what Some examples of what Epithelial cells may look like: Epithelial cells may look like:

Where can Epithelial tissues be Where can Epithelial tissues be found? found?

Some are found lining the lungs and help exchange oxygen and carbon dioxide.

Some line the kidneys and glands in the body (ie; sweat gland)

Others are found in the skin as a tough layer.

Still others are found in the respiratory organs, reproductive organs and bladder or uterus.

Where can Epithelial tissues be Where can Epithelial tissues be found? found?

STOP: Tissue PracticeSTOP: Tissue Practice

1. Tissue worksheet practice QUITELY!!

2. Epithelial tissue microscope lab and practice.

Connective TissuesConnective TissuesDifferent types: 1.1.Loose Connective TissueLoose Connective Tissue2.2.Adipose Tissue (fat tissue)Adipose Tissue (fat tissue)3.3.Dense Connective TissueDense Connective Tissue4.4.BloodBlood5.5.BoneBone6.6.CartilageCartilage

1. Loose Connective Tissue2. Adipose Tissue (fat tissue)3. Dense Connective Tissue

General Characteristics of General Characteristics of Connective TissuesConnective Tissues

Binds structures (Connects structures: tendons and ligaments)

Provides support and protectionGives nutrients to epithelial

tissues

Fill spaces (takes up space)Stores fatProduce blood cellsProtect against infectionsHelp repair tissue damage

General Characteristics of General Characteristics of Connective TissuesConnective Tissues

General Functions of General Functions of Connective TissuesConnective Tissues

They divide easily.

Have a large blood supply and are well nourished. (this is where epithelial cells receive blood and nutrients).

Connected to epithelial cells. Some have a fixed number of

cells and some are temporary and appear when needed in response to injury or infection.

General Functions of General Functions of Connective TissuesConnective Tissues

Some examples of what Some examples of what Connective tissues look like: Connective tissues look like:

Some examples of what Some examples of what Connective tissues look like: Connective tissues look like:

Some examples of what Some examples of what Connective tissues look like: Connective tissues look like:

Some examples of what Some examples of what Connective tissues look like: Connective tissues look like:

Where can you find Connective Tissue?

Underneath epithelial cellsThe space between cells and organsFat tissue can be anywhere- on the surface

of organs, under skin, around the eyes and cushions joints.

Ligaments and tendonsBlood Bone

STOP: Connective Tissues Activities

Flip chart of all tissues!

Worksheet

Microscope lab of connective tissues

Muscle TissuesMuscle TissuesThree types of muscle tissues:

1. Skeletal Muscle tissue2. Smooth Muscle tissue3. Cardiac Muscle tissue

Characteristics: They are contractile- the elongated

cells can shorten and lengthen. As the contract, muscle fibers pull at

the attached end causing body parts to move.

Cardiac MuscleCardiac MuscleWhat is Cardiac

Muscle?

Where would you find it?

What is its function?

Cardiac MuscleCardiac MuscleWhat is it?

Cells are striated and joined end to end.One nuclei

Where do you find it?Only in the heart

What is it’s function? Involuntary (works without you knowing or

thinking)Pumps blood through the heart chambers and

into blood vessels.

Skeletal MuscleSkeletal Muscle

What is Skeletal Muscle?

Where would you find it?

What is its function?

Skeletal MuscleSkeletal MuscleWhat is it?

Voluntary muscle (controlled by conscious effort)

Lots of nuclei in each cellWhere is it?

Found in muscles that attach bone.

What is its function?Nerves stimulate the muscle fiber to

contract and relaxThis helps us move our head, trunk, and

limbs. Enable us to make facial expressions, write,

talk, sing, chew, breath and so forth!

Skeletal MuscleSkeletal Muscle

Smooth MuscleSmooth Muscle

What is Smooth Muscle?

Where would you find it?

What is its function?

Smooth MuscleSmooth MuscleWhat is it?

No striationsShort and spindle shaped, with single

central nucleusInvoluntary actions

Where is it? The walls of organs (stomach, intestine, bladder, blood vessels)

Nervous tissueNervous tissueWhat is Nervous

tissue?

Where would you find it?

What is its function?

Nervous TissueNervous TissueWhat is it?

Made up of cells of neurons- which sense changes in their surroundings

Where is it? The brain, spinal cord and peripheral

nerves.

Nervous TissueNervous TissueWhat is the function?

Transmit nerve impulses to other neurons, muscles or glands.

They communicate with other cells and muscles and tell body functions what to do.