Slide 1Today’s AgendaMy Info !ExpectationsMore ExpectationsEven More ExpectationsTerminologyTerminologyTerminologyCheck Point #1!TissuesTissue TypesMore TissueCell TypesCheck Point #2Slide 16Slide 17SkinBad Skin Gets Little CareKeratinocytes & MelanocytesLayers of the DermisSlide 22Slide 23Lab 1Intro, Planes, Terminology, and Connective TissueAshlyn Brown09/08/14 - 09/12/14Today’s AgendaIntroductionExpectationsTerminologyTissuesCell TypesSkinClinical ApplicationsGroup WorkQuizMy Info !Ashlyn BrownEmail: [email protected]Office Hours: 12:30 – 2PM Tuesdays & 1:30 – 3 Wednesdays in BEL 327ESorry….no meetings by appointment :/ExpectationsQuizzes2 quizzesOne at the beginning from lab manual (don’t be late!)One at the end from “pool questions”Muscle Cards30 Cards total10 each due for the next three labsPresentationsBegin thinking of groups and topicsBy the 3rd week (week of 9/22) you should have groups chosenTopics must be turned into me by the week of 10/1310-15 min. long presentationGroups of 5-6 personsMore ExpectationsAttendanceExcused absences require an official reason/advanced noticeUnexcused absencesAttending other lab sections w/o prior approvalLeaving lab early w/o permissionStudents will be dropped from class with an “F” after the 3rd absenceEven More ExpectationsGradingLab Practicals (2) x 100 pts each = 200 ptsQuizzes (8) x 10 points each = 80 ptsPresentations x 15 points = 15 ptsMuscle flashcards x 5 points = 5 pts Total = 300 pointsTerminologyTerminologyTerminologyCheck Point #1!Your mouth is __________ to your eyes. What plane causes this? _________Your wrist is ________ to your shoulderThe reticular layer of the dermis is ___________ to the papillary layer of the dermisYour nose is ________ to your butt. What plane causes this?______________Your tibia is ______to your fibula.inferiordistaldeepanteriortransverseCoronal/ frontalmedialTissuesTissue TypesEpithelialCells bound closely by cell junctions (for diffusion)Little extracellular tissue in betweenPolarityAvascularCan be regeneratedConnectiveAll CT arises from mesenchymeRange of vascularityComposed of large amounts of extracellular matrix rather than tightly joined cellsMore TissueMuscleVascularInnervatedContains contractile proteins that allow movementNervousGenerates and conducts electrical impulsesGenerally incapable of dividing/ regeneratingCell TypesCheck Point #2In groups of 3 to 4, tell me everything you know about your given cell type: simple epithelium, stratified epithelium, glandular epithelium, loose areolar CT and adipose tissue, dense irregular and regular CT, or cartilageSkinBad Skin Gets Little Care•Stratum Basale- a single layer of columnar germinating cells. The germinating cells divide and the daughter cells get pushed up to form more superficial layers•Stratum Spinosum- a layer of ovular, flat cells with short spines•Stratum Granulosum- 3-5 cell layers thick of granules containing keratohyalin•Stratum Lucidium-a few layers of dead cells that are flattened, bright, and clear. Only seen in thick skin•Stratum Corneum-the most superficial layer that consists of 20-30 layers of flattened cells. These consist of dead keratinocytes and protect against abrasion. Responsible for differences in skin thicknessKeratinocytes & Melanocytes•Takes ~35-40 days for keratinocytes to move from the Basale layer to the Corneum layer and shed.•Melanocytes are only found in the basale layer and don’t arise from the germinating keratinocytes•20 keratinocytes:1 melanocyte in basale layer•Melanocytes secrete melanin pigment into the lower epidermal layers and hair folliclesClick icon to add pictureLayers of the DermisPapillary layer20% of the dermis- thin arrangements of collagen fibersSupplies epidermis with nutrients and oxygenThe border between the dermis and epidermis contains papillae which increase SAFree nerve endings and the Meissener’s Corpuscles are found here and sense pain and light touchesReticular layer80%of the dermis- thick arrangements of collagen fibers (dense irregular)Responsible for creating lines of cleavageContains Pascinian Corpuscles which sense deep, constant touch & pressureClinical
View Full Document