Unit 2 Cells and Tissues Levels of Organization

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Unit 2 - Cells and Tissues

Unit 2 - Cells and Tissues

Levels of Organization • Cells – Building blocks of the body • Tissues –

Levels of Organization • Cells – Building blocks of the body • Tissues – A group of similar cells that combine to perform a certain function (4 - muscle, • nervous, connective, epithelial) • Organs – Two or more different types of tissue – combined to perform a certain • function – (kidney, liver, lung) • System – organization of > 2 or more organs perform a more general function

Histology-study of tissues • • • 4 types of tissue in the body epithelial

Histology-study of tissues • • • 4 types of tissue in the body epithelial connective muscular nervous

Epithelial Tissue Arrangements: • Simple- Cells are found in a single layer attached to

Epithelial Tissue Arrangements: • Simple- Cells are found in a single layer attached to the basement membrane • Stratified- Cells are found in 2 or more layers stacked atop each other • Pseudostratified- a single layer of cells that appears to be multiple layers due to variance in height and location of the nuclei in the cells.

Pseudo stratified

Pseudo stratified

Epithelial Tissue Shapes: • Squamous- (Latin, squama- scale)- flat, thin, scale-like cells • Cuboidal-

Epithelial Tissue Shapes: • Squamous- (Latin, squama- scale)- flat, thin, scale-like cells • Cuboidal- cells that have a basic cube shape. Typically the cell's height and width are about equal. • Columnar- tall, rectangular or column-shaped cells. Typically taller than they are wide.

Epithelial characteristics: • • major tissue of glands inner lining of body cavities inner

Epithelial characteristics: • • major tissue of glands inner lining of body cavities inner lining of hollow organs anchored to connective tissue by a basement membrane • lacks blood vessels

Connective Tissue functions: • • • Binds structures Provides support Protection Stores fat Produces

Connective Tissue functions: • • • Binds structures Provides support Protection Stores fat Produces blood cells

Connective Tissue characteristics: • Cells farther apart • Intercellular material/matrix between them • FIBROBLAST-

Connective Tissue characteristics: • Cells farther apart • Intercellular material/matrix between them • FIBROBLAST- major cell creates fibers

Muscular Tissue * MOVEMENT of structures or materials 3 Types: • SKELETAL/STRIATED • SMOOTH

Muscular Tissue * MOVEMENT of structures or materials 3 Types: • SKELETAL/STRIATED • SMOOTH • CARDIAC

NERVOUS TISSUE • Transmit electrical impulses throughout the body • Includes- brain, spinal cord,

NERVOUS TISSUE • Transmit electrical impulses throughout the body • Includes- brain, spinal cord, nerves • Neurons- basic unit of nervous system, TRANSMIT impulses • Neuro. GLIA- supporting cells, no impulses

Levels of Organization Levels of Organization Cells LevelsLevels of Organization Levels of Organization Cells Levels
Body Tissues Body Tissues Tissues Groups of cellsBody Tissues Body Tissues Tissues Groups of cells
Tissues Tissues Cells are arranged in Tissues thatTissues Tissues Cells are arranged in Tissues that
Tissues Definition Tissues Definition Collections of cells TissuesTissues Definition Tissues Definition Collections of cells Tissues
Chapter 5 Tissues Tissues TISSUES Organization or communitiesChapter 5 Tissues Tissues TISSUES Organization or communities
Cells and Tissues Cells and Tissues l CarryCells and Tissues Cells and Tissues l Carry
Chapter 3 Cells and Tissues Cells and TissuesChapter 3 Cells and Tissues Cells and Tissues
Cells and Tissues Chapter 3 Cells and TissuesCells and Tissues Chapter 3 Cells and Tissues
Cells and Tissues Cells and Tissues Carry outCells and Tissues Cells and Tissues Carry out
Chapter 3 Cells and Tissues Cells and TissuesChapter 3 Cells and Tissues Cells and Tissues
CHAPTER 3 CELLS AND TISSUES Cells And TissuesCHAPTER 3 CELLS AND TISSUES Cells And Tissues
Unit 2 Cells and Tissues Levels of OrganizationUnit 2 Cells and Tissues Levels of Organization
Chapter 4 Cells and Tissues Body Tissues CellsChapter 4 Cells and Tissues Body Tissues Cells
PLANT CELLS and TISSUES PLANT CELLS PLANT TISSUESPLANT CELLS and TISSUES PLANT CELLS PLANT TISSUES
Cells Tissues Tissues Groups of cells with aCells Tissues Tissues Groups of cells with a
Tissues 1 Tissues and tissue types l TissuesTissues 1 Tissues and tissue types l Tissues
The Four Levels of Organization Cells form tissuesThe Four Levels of Organization Cells form tissues
Levels of Organization Identify cells tissues organ systemsLevels of Organization Identify cells tissues organ systems
Levels of Organization Identify cells tissues organ systemsLevels of Organization Identify cells tissues organ systems
Levels of Organization How do cells tissues organLevels of Organization How do cells tissues organ
Levels of Organization Identify cells tissues organ systemsLevels of Organization Identify cells tissues organ systems
Human Body Systems Levels of Organization Cells TissuesHuman Body Systems Levels of Organization Cells Tissues
Levels of Organization Cells Tissues Organ Systems OrganismLevels of Organization Cells Tissues Organ Systems Organism
Tissues Histology the study of tissues Tissues ATissues Histology the study of tissues Tissues A