Unit 1: Organization of the Body DLT’s: 13 – 17 8/19/2014 Chapter 4: Tissue

Unit 1: Organization Unit 1: Organization of the Bodyof the Body

DLT’s: 13 – 17DLT’s: 13 – 17

8/19/20148/19/2014

Chapter 4: TissueChapter 4: Tissue

DLT 13: I can list the four major tissue DLT 13: I can list the four major tissue types.types.

Groups of cells similar in structure Groups of cells similar in structure and functionand function

The four types of tissuesThe four types of tissues– EpithelialEpithelial– ConnectiveConnective– MuscleMuscle– NerveNerve

DLT 14: I can name the types of epithelium, DLT 14: I can name the types of epithelium, describe the general characteristics and functions describe the general characteristics and functions

of epithelium, and identify an organ in which each is of epithelium, and identify an organ in which each is found.found.

Epithelium is a sheet of cells that covers a body Epithelium is a sheet of cells that covers a body surface or lines a body cavity.surface or lines a body cavity.– Covering and lining epitheliumCovering and lining epithelium

Forms the outer layer of the skin, dips into and lines the open Forms the outer layer of the skin, dips into and lines the open cavities of the cardiovascular, digestive, and respiratory cavities of the cardiovascular, digestive, and respiratory systems, and covers the walls and organs of the closed systems, and covers the walls and organs of the closed ventral body cavity.ventral body cavity.

– Glandular epitheliumGlandular epithelium Forms the glands of the body.Forms the glands of the body.

Functions include:Functions include:– ProtectionProtection– AbsorptionAbsorption– FiltrationFiltration– ExcretionExcretion– SecretionSecretion– Sensory receptionSensory reception


of epithelium, and identify an organ in which each is of epithelium, and identify an organ in which each is found.found.

Simple epithelia: Simple epithelia: Composed of a single Composed of a single layer of cells – found layer of cells – found where absorption and where absorption and filtration occur.filtration occur.

Stratified epithelia: Stratified epithelia: Composed of two or Composed of two or more layers – common more layers – common in high-abrasion areas in high-abrasion areas where protection is where protection is important.important.


of each, and identify an organ in which each is of each, and identify an organ in which each is found.found.

Simple Epithelia:Simple Epithelia:– Simple SquamousSimple Squamous– Simple CuboidalSimple Cuboidal– Simple ColumnarSimple Columnar– Pseudostratified Columnar Pseudostratified Columnar Stratified Epithelia:Stratified Epithelia:– Stratified SquamousStratified Squamous– Stratified CuboidalStratified Cuboidal– Stratified ColumnarStratified Columnar– TrasitionalTrasitional













Stratified cuboidalStratified cuboidal– Quite rare in the bodyQuite rare in the body– Found in some sweat and mammary glandsFound in some sweat and mammary glands– Typically two cell layers thickTypically two cell layers thick

Stratified columnar Stratified columnar – Limited distribution in the bodyLimited distribution in the body– Found in the pharynx, male urethra, and lining Found in the pharynx, male urethra, and lining

some glandular ductssome glandular ducts– Also occurs at transition areas between two Also occurs at transition areas between two

other types of epitheliaother types of epithelia



DLT 15: I can list the types of connective DLT 15: I can list the types of connective tissues, describe each type’s major tissues, describe each type’s major

functions, and describe common functions, and describe common characteristics.characteristics.

Connective tissue is found everywhere in the Connective tissue is found everywhere in the body. body.

Four main classes: Four main classes: – Connective tissue properConnective tissue proper (broken down into loose (broken down into loose

areolar, adipose and reticular, and dense regular and areolar, adipose and reticular, and dense regular and irregular) irregular)

– Cartilage Cartilage (broken down into hyaline, elastic, and (broken down into hyaline, elastic, and fibrocartilagefibrocartilage

– Bone tissueBone tissue– BloodBlood

Major functions:Major functions:– Binding and supportBinding and support– ProtectionProtection– InsulationInsulation– transportationtransportation





















DLT 16: I can list the general DLT 16: I can list the general characteristics of nervous characteristics of nervous

tissue.tissue. The main component of the nervous The main component of the nervous

system – the brain, spinal cord, and system – the brain, spinal cord, and nervesnerves– Regulates and controls body functions. Regulates and controls body functions.

Transmits electrical signals from sensory Transmits electrical signals from sensory receptors to effectorsreceptors to effectors

Two major cell types:Two major cell types:– Branched neurons with long cellular Branched neurons with long cellular

processes and support cellsprocesses and support cells

DLT 16: I can list the general DLT 16: I can list the general characteristics of nervous characteristics of nervous

tissue.tissue.

DLT 17: I can distinguish between the DLT 17: I can distinguish between the three types of muscle tissues, and three types of muscle tissues, and

describe the general characteristics of describe the general characteristics of each.each.

Highly cellular, well-vascularized tissues that Highly cellular, well-vascularized tissues that are responsible for most types of body are responsible for most types of body movement.movement.

Possess myofilaments, elaborate versions of Possess myofilaments, elaborate versions of the the actinactin and and myosinmyosin filaments that bring filaments that bring about movement or contraction in all cell about movement or contraction in all cell types.types.

Three types:Three types:– Skeletal muscleSkeletal muscle– Cardiac muscleCardiac muscle– Smooth muscleSmooth muscle







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Unit 1: Organization of the Body DLT’s: 13 – 17 8/19/2014 Chapter 4: Tissue