TISSUES OF THE BODY · Types: Smooth – – lack striations----Two types with striations -----...

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TISSUES OF THE BODY

Transcript of TISSUES OF THE BODY · Types: Smooth – – lack striations----Two types with striations -----...

Page 1: TISSUES OF THE BODY · Types: Smooth – – lack striations----Two types with striations ----- Skeletal – muscle; have cross striations and responsible for body movement Cardiac

TISSUES OF THE BODY

Page 2: TISSUES OF THE BODY · Types: Smooth – – lack striations----Two types with striations ----- Skeletal – muscle; have cross striations and responsible for body movement Cardiac

Key Terms

Histology:

the study of .

Tissues:

groups of cells which are in structure and which perform or related functions.

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Four Basic Kinds of Tissues

Epithelial TissueConnective TissueMuscle TissueNervous Tissue

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Epithelial Tissue

Functions: Cover all virtually all body surfaces, in and out Lack supply Classified based on

of cells Generally supported on a basement

membrane (& connective tissue)

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Epithelial Tissue

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Connective Tissue

Connective Tissue: Most & distributed tissue

Connective Tissue Functions: Connects, binds and supports structures Tendons, ligaments, etc.

organs and tissues Insulates (fat) and Transports substances (blood).

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Connective Tissue

Examples: Connective Tissue

Proper

lining of digestive tract

Tendons Dermis of skin

Fluid Connective Tissue

Lymph

Supporting Connective Tissue Collagen

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Connective Tissue

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Connective Tissue

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Muscle Tissue

Muscle Tissue: Associated with the bones of the skeleton, the heart and in

the walls of the hollow organs of the body. Muscle Tissue Functions:

Movement

Maintains posture Produces heat Facial expressions

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Muscle Tissue

Types: Smooth – – lack striations----Two types with striations----------- Skeletal – muscle; have cross

striations and responsible for body movement Cardiac – only found in heart – branched cells

bound end to end by intercalated discs

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Muscle Tissue

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Muscle

Tissue

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Nervous Tissue

Nervous Tissue: Main component of the ,

ie., brain, spinal cord & nerves.

Nervous Tissue Functions: Regulates & body functions Generates & transmits nerve Supports, insulates and protects impulse generating

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Nerve Tissue

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Identify the following cell organelles

Cell Organelles cell membrane cytoplasm nucleus nuclear membrane nucleolus chromosomes chromatin

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Cell Organelles - Onion

Cell membrane

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Cell Organelles - Onion

Cytoplasm

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Cell Organelles - Onion

Nuclear Membrane

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Cell Organelles - Onion

Nucleolus

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Cell Organelles - Onion

Chromatin

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Specific tissue types & representative cell types we will review:

epithelial

connective

muscle

nervous

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Squamous Epithelium

Simple – one cell thick

Forms solid layer of cells which line blood vessels, body cavities & cover organs in body cavities

Stratified –

Forms

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Cuboidal Epithelium

Simple – one cell thick Roughly shaped

Line ducts in kidneys, etc, where reabsorption and secretory activities take place.

Duct

Cuboid Cells

Duct

Cuboid Cells

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Columnar Epithelium

Simple – one cell thick shaped

(long & narrow) Line digestive tract

where & secretion occurs.

Pseudostratified –gives the appearance of more than one layer of columnar epithelial cells

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Connective - Adipose

Honeycomb or chickenwire appearance

Insulates Supports & protects

organs

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Connective - Bone

Tree ring-like appearance

Fat storage Blood cell production

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Connective – Hyaline Cartilage

Supports while providing flexibility

Absorbs compression between bones in joints (articularcartilage)

Holds open respiratory passages

Most abundant type of cartilage in body

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Muscle - Skeletal Muscle fibers (cells) long, parallel & cylindrical

With many nuclei (multinucleate)

Striations (cross stripes run perpendicular to the cells

Heat

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Specific Nervous Tissue TypesNervous – Neuron

Branching cells with many long processes

Large central nucleus Transmit impulses

from one area of the body to other areas

Regulate activities through


Digital Striations

Digital Striations

3 Types of Muscles Smooth Cardiac Skeletal Smooth Muscle No striations Single nucleus No/underdeveloped transverse tubules Involuntary Contracts in.

3 Types of Muscles Smooth Cardiac Skeletal Smooth Muscle No striations Single nucleus No/underdeveloped transverse tubules Involuntary Contracts in.

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