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Cuz this stuff is difficult!

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Presentation on theme: "Cuz this stuff is difficult!"— Presentation transcript:

1 Cuz this stuff is difficult!
More Examples for Lab 3 Cuz this stuff is difficult!

2 Questions to ask for identifying tissues:
Does it have an edge? Is it composed of cells tightly packed together (little or no intercellular material)? Epithelial Tissue Are cells few and scattered, separated by intercellular material? Connective Tissue What is it? What is it?

3 Types of Epithelium Simple Squamous Simple Cuboidal Simple Columnar
Pseudostratified Stratified Squamous Stratified Cuboidal Stratified Columnar Transitional

4 Simple Squamous Epithelium
What is it? Single layer of flattened cells Diffusion and filtration of materials Found in… Kidney glomeruli Air sacs of lungs Blood vessels Serous membrane

5 Simple Columnar Epithelium
What is it? Single layer of tall cells Some may have cillia Absorption, secretion of mucus and enzymes Found in… Digestive tract Bronchi

6 Stratified Squamous What is it? Several layers of flattened cells on top of a layer of cuboid or columnar cells May be keratinized or non keratinized Protection in areas subject to abrasion Found in… Esophagus, mouth Epidermis

7 Stratified Cuboidal Typically only 2 layers of cells Very rare
What is it? Typically only 2 layers of cells Very rare Found in… Ducts of large glands

8 Pseudostratified Single layer of cells differing in heights
What is it? Single layer of cells differing in heights May contain cilia or goblet cells Secretion and propulsion of mucus Found in… Trachea Sperm carrying ducts Large glands

9 Stratified Columnar What is it? Several layers of cells with columnar cells at the apical surface Protection and secretion Found in… Pharynx Male urethra Lines some glands

10 Simple Cuboidal Epithelium
What is it? Single layer of cube-like cells Secretion and absorption Found in … Kidney tubules Glands

11 Transitional Several layers of cells; variable shapes (“plumpy”)
What is it? Several layers of cells; variable shapes (“plumpy”) Designed to stretch and permit distention of the organ Found in… Bladder Ureters

12 To identify Epithelial Tissue types:
Layers Is it a single layer of cells or multilayered (2 or more)? Shape Single layer: What is the shape of the cells? Multilayered: What is the shape of the apical cells? Note the difference between psudostratified columnar and stratified columnar

13 REVIEW Epithelial Tissue Connective Tissue Forms an ____
Is composed of ________________ with little or no _________________ Connective Tissue Cells are ______________ Dominated by _________________ Usually _____ are abundant edge tightly packed cells extracellular material few and scattered intercellular material fibers

14 Types of Connective Tissue
Areolar CT Adipose CT Reticular CT Dense Regular CT Dense Irregular CT Hyaline Cartilage Elastic Cartilage Fibrocartilage Mesenchyme

15 Adipose Connective Tissue
What is it? Sparse matrix Closely packed together adipocytes Stores food fuel; protects organs Found… Under skin Around organs In abdomen

16 Fibrocartilage Thick collagen fibers
What is it? Thick collagen fibers Tensile strength and can absorb compression Found Intervertebral discs Pubic symphysis

17 Dense Irregular Irregularly arranged collagen fibers
What is it? Irregularly arranged collagen fibers Withstand forces from many directions Found Dermis Joint capsules

18 Reticular Connective Tissue
What is it? Reticular fibers; variety of cells Form soft, internal skeleton of some organs Found… In lymphoid organs

19 Elastic Cartilage Elastic fibers in the matrix
Maintains structure with flexability Found External ear What is it?

20 Hyaline Cartilage Amorphous collagen matrix with chondrocytes
Supports, reinforcement and cushioning Found Embryonic skeleton Covers ends of long bones Costal cartilage What is it?

21 Dense Regular Parallel collagen fibers Withstands great pulling force
What is it? Parallel collagen fibers Withstands great pulling force Attach muscles to bones; bones to bones Found Tendons ligaments

22 Areolar Connective Tissue
What is it? Gel like matrix with collagen and elastic fibers Fibroblasts Cushions organs; important for inflammation Found… Under epithelium Surrounds organs and capillaries

23 To identify Connective Tissue types:
Are there chondrocytes inside lacunae? If YES = Is the matrix smooth-looking? Or: Are chondrocytes large and is matrix composed of short, messy fibers? Or: Are chondrocytes small and is matrix composed of long, wavy fibers? If NO = Cartilage Connective tissue proper

24 To identify Connective Tissue Proper:
Are fibers thin & scattered or nearly absent? Is matrix a network of fibers mixed with cells? Or: Are cells large and packed together with nuclei shoved to the outer rim? Or: Is matrix filled with small, round cells and some fibers (looks like a bunch of grapes)? Are fibers thick, filling the matrix? (Loose Connective Tissue) (Dense Connective Tissue)

25 To identify Connective Tissue Proper:
Fibers thick, filling the matrix (Dense Connective Tissue) Are fibers thick, long and smooth? Or: Are fibers thick and messy appearing?

26 And now.. Time for a Quiz!!

27 Adipose

28 Simple Squamous

29 Hyaline Cartilage

30 Pseudostratified

31 Simple Cuboidal

32 Areolar

33 Stratified Columnar

34 Dense Irregular

35 Stratified Squamous

36 Fibrocartilage

37 Dense Regular

38 Stratified Cuboidal

39 Hyaline Cartilage

40 Reticular

41 Simple Cuboidal

42 Areolar

43 Elastic Cartilage

44 Simple Columnar

45 Transitional

46 Simple Squamous

47 Adipose

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