Histology. Histology. Tissue - Four main tissues in body. 1. Epithelial tissue an epithelium; plural: epithelia. Function. Location.

Transcription

1 Histology Histology Tissue Four main tissues in body 1. Epithelial tissue an epithelium; plural: epithelia Function Location Characteristics Example 2. Connective tissue Function Location Characteristics Example

2 3. Muscle tissue Function Location Characteristics Example 4. Nerve tissue Function Location Characteristics Example

3 General Organization Arm/Leg crosssection Epithelial Connective Muscle Nerve Hollow organ crosssection Epithelial Connective Muscle Nerve

4 1. Functions a. Epithelial Tissue example skin b. c. d. e. f. 2. Characteristics a. closely packed cells b. form sheets of tissue c. cells reproduce rapidly d. contains free surface e. contains connected surface f. supported by connective tissue g. contains nerves but not blood vessels (picture)

5 Terminology Simple = Stratified = Squamous = Cuboidal = Columnar = Types of Epithelial Tissue

6 Functions 1. Connect ligaments tendons cartilage Connective Tissue 2. Support 3. Protection 4. Insulation 5. Fuel 6. Transportation Characteristics 1. Mesenchyme 2. Vascularity Number of blood vessels range from cartilage = dense = all others = 3. Made from cells, fibers, and ground substance

7 Parts of Connective Tissue 1. Ground substance = matrix = glue 2. Fibers a. collagen fibers b. elastic fibers c. reticular fibers 3. Cells a. BLASTS cells that form, (secrete), ground and fibers fibroblast chondroblast osteoblast hematopoietic stem cells b. CYTES mature cells grown up BLASTS can go back to BLAST form when tissue injured fibrocytes found in connective tissue proper chondrocytes found in cartilage asteocytes found in bones hematopoietic stem cell blood

8 Other cells in connective tissue 1. blood cells 2. plasma cells 3. mast cells 4. macrophages

9 I. Naming Connective tissue Table on page 125 A B II. A. B. C. III. Bone A. B. IV. Blood A. B. C.

10 Muscle Tissue Function Characteristics Histology muscle and nerve tissue Types

11 Nerve Tissue Functions Characteristics Types

12 Epithelial Membranes continuous multicellular sheet composed of at least two tissues (epithelium and connective tissue proper) Three types: cutaneous, mucous, serous 1. Cutaneous = skin = stratified sqamous (epidermis) + dense irregular (dermis) a. b. 2. Mucous Membrane = mucosae a. b. c. d. 3. Serous Membrane = serosae a. b. i. visceral ii. parietal

13 Repair of Skin What happens after you cut your skin and begin to bleed? 1. Injured cells release chemicals which cause capillaries to dilate and become permeable 2. Now more white blood cells, other cells, and plasma fluid enter injured areas. 3. Clotting occurs and antibodies are released to fight infection. 4. Exposed clot dries and forms scab. 5. Damaged interior cells phagocytized by macrophages. 6. New capillaries are formed connecting broken blood vessels. 7. Fibroblasts make new fibrocytes that replace broken fibers. Concentrated fibers in injured area are also called scar tissue. 8. Epithelium begins to regenerate under scaband eventually scab falls off

14 Repair of Other Tissue Regeneration of tissue varies. Best Regeneration Moderate Regeneration Weak Regeneration No Regeneration

15 Name : Name :

16 Name : Name :

17 Name : Name :

18 Name : Name :

19 Name : Name :

20 Name : Name :

21 Name : Name :

22 Name : Name :

23 Name : Name :

24 Name : Name :

25 Name : Name :

26 Name : Name :

27