Monday, September 21, Monday, September 21, 20152015

Turn Tissue writing in; put in Turn Tissue writing in; put in blue basketblue basket

Check your grade (on white Check your grade (on white board) if you didn’t last classboard) if you didn’t last class

Get out paper & something to Get out paper & something to write with. write with.

Get ready to take some notes.Get ready to take some notes.

Info to knowInfo to know

Tomorrow – all Tissue labs due at Tomorrow – all Tissue labs due at beginning of classbeginning of class

Thurs. / Fri. – Tissue Quiz; will cover Thurs. / Fri. – Tissue Quiz; will cover tissue identification & these tissue tissue identification & these tissue notesnotes

Thurs. – HOSA dues & yellow cards Thurs. – HOSA dues & yellow cards must be turned inmust be turned in

Tissue NotesTissue Notes

Chapter 3Chapter 3

BasicsBasics

Are similar cells organized to carry Are similar cells organized to carry out a particular functionout a particular function

4 types: 4 types: 1.1. epithelial epithelial

2.2. connectiveconnective

3.3. musclemuscle

4.4. nervousnervous

Naming (according to shape and Naming (according to shape and arrangement)arrangement)

Simple = single layerSimple = single layer Squamous = thin, flat cellsSquamous = thin, flat cells Cuboidal = cube-shaped cellsCuboidal = cube-shaped cells Columnar = elongated (longer than Columnar = elongated (longer than

wide)wide) Stratified = layeredStratified = layered Pseudo = “false”; looks one way but isn’tPseudo = “false”; looks one way but isn’t Loose = loosely packedLoose = loosely packed Dense = tightly packedDense = tightly packed Smooth = no striations (ridges / stripes)Smooth = no striations (ridges / stripes)

EpithelialEpithelial

function: protection, secretion, absorption,function: protection, secretion, absorption, Location: body surfaces, cover & line internal Location: body surfaces, cover & line internal

organs, organs, compose glandscompose glands Lack blood vessels, cells are tightly packedLack blood vessels, cells are tightly packed Types: simple squamous, simple cuboidal, Types: simple squamous, simple cuboidal,

simple columnar, pseudostratified columnar, simple columnar, pseudostratified columnar, stratified squamous, stratified cuboidal, stratified squamous, stratified cuboidal, stratified columnar, transitional, glandularstratified columnar, transitional, glandular

Endocrine glandsEndocrine glands

Ductless glandsDuctless glands Secretions diffuse directly into the Secretions diffuse directly into the

bloodblood Secrete hormonesSecrete hormones

Exocrine glandsExocrine glands

Have ductsHave ducts Empty their secretions onto the Empty their secretions onto the

epithelial surfaceepithelial surface Examples: sweat glands Examples: sweat glands

(sudoriferous), oil (sebaceous) (sudoriferous), oil (sebaceous) glands, liver, pancreasglands, liver, pancreas

Types of glandsTypes of glands

Merocrine = fluid released; salivary, Merocrine = fluid released; salivary, pancreatic, sweat glands in skinpancreatic, sweat glands in skin

Apocrine = secretion and part of the Apocrine = secretion and part of the cell released; mammary, ceruminous cell released; mammary, ceruminous glands (wax producers) in external earglands (wax producers) in external ear

Holocrine = cell filled with secretion Holocrine = cell filled with secretion released; sebaceous glands (oil) in skinreleased; sebaceous glands (oil) in skin

ConnectiveConnective Bind, support, protect, fill spaces, store Bind, support, protect, fill spaces, store

fat, produce blood cellsfat, produce blood cells Found throughout bodyFound throughout body Good blood supply (well vascularized); Good blood supply (well vascularized);

have extracellular matrix (fibers and a have extracellular matrix (fibers and a ground substance) in betweenground substance) in between

Types: loose connective, adipose (fat), Types: loose connective, adipose (fat), dense connective, hyaline cartilage, dense connective, hyaline cartilage, elastic cartilage, fibrocartilage, bone, elastic cartilage, fibrocartilage, bone, bloodblood

Connective, cont’dConnective, cont’d

ComponentsComponents Fibroblasts = make fibersFibroblasts = make fibers Macrophages = carry out phagocytosisMacrophages = carry out phagocytosis Mast cells = secrete heparin and histamineMast cells = secrete heparin and histamine Chondrocytes = cartilage cellsChondrocytes = cartilage cells Collagenous fiber = provide tensile Collagenous fiber = provide tensile

strengthstrength Elastic = stretchesElastic = stretches Reticular = give delicate supportReticular = give delicate support

MuscleMuscle Function = movementFunction = movement Found attached to bones, in the walls of Found attached to bones, in the walls of

hollow internal organs and the hearthollow internal organs and the heart Muscles contract in response to stimuliMuscles contract in response to stimuli

The muscle fibers shortenThe muscle fibers shorten Types: skeletal (striated), smooth Types: skeletal (striated), smooth

(lacks striations), cardiac (striated)(lacks striations), cardiac (striated) Striated = ridges; alternating light and Striated = ridges; alternating light and

dark cross-markingsdark cross-markings

NervousNervous Transmits electrochemical impulses Transmits electrochemical impulses

for coordination, regulation, for coordination, regulation, integration and sensory receptionintegration and sensory reception

Found in the brain , spinal cord, and Found in the brain , spinal cord, and nervesnerves

Cells connect to each other and other Cells connect to each other and other body partsbody parts

Functional characteristics – irritability Functional characteristics – irritability & conductivity& conductivity

Membranes = 2 types of tissue Membranes = 2 types of tissue working togetherworking together

Serous – line cavities that don’t open Serous – line cavities that don’t open to the outsideto the outside Line the thorax, and abdomen and cover Line the thorax, and abdomen and cover

the organs in these cavitiesthe organs in these cavities Mucous = line cavities that do open to Mucous = line cavities that do open to

the outsidethe outside Oral & nasal cavities; line tubes of Oral & nasal cavities; line tubes of

digestive, respiratory, urinary and digestive, respiratory, urinary and reproductive systemsreproductive systems

Membranes, cont’dMembranes, cont’d

Cutaneous = skinCutaneous = skin Synovial = lines jointsSynovial = lines joints