Tissue Structure and Tissue Structure and FunctionFunction

Chapter 9 in TextbookChapter 9 in Textbook

Chapter 4 in Lab BookChapter 4 in Lab Book

TissueTissue

An aggregation of cells and cell An aggregation of cells and cell products of similar structure and products of similar structure and embryonic origin that perform a embryonic origin that perform a

common functioncommon function

HistologyHistology

The study of tissues, especially The study of tissues, especially their structure and arrangementtheir structure and arrangement

Basic Tissue TypesBasic Tissue Types

EpithelialEpithelial ConnectiveConnective MuscleMuscle NervousNervous

OrganOrgan

An aggregation of tissues An aggregation of tissues organized into a functional unitorganized into a functional unit

SystemSystem

Organs working together as Organs working together as functional unitsfunctional units

Epithelial TissueEpithelial Tissue

Sheet-like layer of cellsSheet-like layer of cells Cover surfaces or line cavitiesCover surfaces or line cavities Often has glandular cells for fluid Often has glandular cells for fluid

secretionsecretion EndotheliumEndothelium

Epithelium that lines heart, blood Epithelium that lines heart, blood vessels and lymphatic vesselsvessels and lymphatic vessels

Epithelial TypesEpithelial Types

Simple EpitheliumSimple Epithelium Simple squamous – inside blood vesselsSimple squamous – inside blood vessels Simple cuboidal – lines ducts, ex. Kidney Simple cuboidal – lines ducts, ex. Kidney

tubules, mucous glandstubules, mucous glands Simple columnar – lining of small Simple columnar – lining of small

intestineintestine Pseudostratified Columnar – trachea, Pseudostratified Columnar – trachea,

bronchibronchi

Figure 09.9aFigure 09.9a

Figure 09.9bFigure 09.9b

Pseudostratified ColumnarPseudostratified Columnar

Stratified EpitheliumStratified Epithelium Stratified squamous - skinStratified squamous - skin Transitional – urinary tract and bladderTransitional – urinary tract and bladder

Epithelial TypesEpithelial Types

Connective TissueConnective Tissue

Tissue that connects Tissue that connects Loose connective tissue Loose connective tissue

adipose (fat)adipose (fat) Dense connective tissue Dense connective tissue

cartilage cartilage BoneBone

Vascular tissueVascular tissue Erythrocytes: Red Blood Cells – carry oxygenErythrocytes: Red Blood Cells – carry oxygen Leucocytes: White Blood Cells – part of the immune Leucocytes: White Blood Cells – part of the immune

systemsystem Platelets - clottingPlatelets - clotting

AdiposeAdipose

Figure 09.11cFigure 09.11c

Figure 09.11dFigure 09.11d

Erythrocytes:Red Blood Cells

Leucocytes: White Blood Cells

Platelets

Muscle Tissue TypesMuscle Tissue Types

Smooth Muscle (=Involuntary Smooth Muscle (=Involuntary Muscle)Muscle) Ex. Small intestineEx. Small intestine

Skeletal Muscel (=Voluntary Muscle)Skeletal Muscel (=Voluntary Muscle) Ex. Large muscles of bodyEx. Large muscles of body

Cardiac Muscle Cardiac Muscle

Skeletal Smooth

Cardiac

Nervous TissueNervous Tissue

Includes Nerves, Spinal Cord, BrainIncludes Nerves, Spinal Cord, Brain Cells are called neuronsCells are called neurons

NeuronNeuron