Lab slides review
- 2. Simple Squamous Epithelial Tissue Nucleus Location: Mesothelium Endothelium Function: Filtration Diffusion Secretion
- 3. Stratified Squamous Epithelial These keratinized epithelial cells will Be sloughed off. Apical Layer Mitotic cells are rounder in appearance Basal Layer
- 4. Simple (= single layer) Cuboidal • Description: Single layer of cube- shaped cells. • Location: small ducts of glands, kidney tubules, Cell is as wide as it is high. One central nucleus surface of ovary. • Function: secretion & absorption
- 5. Simple Cuboidal Lumen: Inside space of • Cells closely packed Tubular structure together and touching one another • Has a basal surface Nucleus Apical Surface and apical surface Basal Surface • Avascular • Sits on a basement membrane (difficult to see on slide)
- 6. Non- Ciliated Simple Columnar • Description: Single layer of non-ciliated rectangular cells; contain goblet cells and sometimes microvilli. • Location: GI tract, ducts, gallbladder • Function: secretion and absorption
- 7. • Nuclei lie near base of cell • Goblets secrete mucous at Simple Columnar Cells apical surface to lubricate Goblet Cell lining of GI, respiratory, Nucleus reproductive and urinary systems. • Microvilli increase surface area for absorption. Goblet Cell
- 8. Pseudostratified Ciliated Columnar Epithelium • Appears stratified because nuclei are at varying levels. • Location: – Ciliated lines airways of upper respiratory tract. • Function: Goblet Cells – Mucus from Goblets traps foreign particles and are Cilia swept away by cilia.
- 9. Goblet Cells secreting mucus Cilia Nuclei at varying levels
- 10. Epithelial and 1 Connective • 1 – pseudostratified columnar epithelial 2 • 2- simple cuboidal epithelial 3 • 3- hyaline cartilage connective tissue
- 11. Collagen Fiber (thicker pink ones) Loose Areolar GROUND SUBSTANCE Connective Tissue FIBER MATRIX Fibroblast CELLS Elastic Fiber
- 12. Teased Dense Regular Connective Tissue • Forms tendons and ligaments and aponeuroses. • Matrix looks white and shiny. • Mostly collagen fibers with fibroblasts between rows. • Strong attachment!
- 13. Teased Dense Regular CT (magnified) Fibroblasts Fibers are mostly Collagen.
- 14. Reticular Connective Tissue Reticular Cells • Network of interlacing reticular fibers & Blue staining reticular cells Reticular fibers • Found in stroma (framework) of liver, spleen, lymph nodes, red bone marrow • Acts as a filter in spleen and lymph nodes.
- 15. Reticular Connective Tissue • Remember that connective tissue is vascular. (Avascular epithelial tissue depends on diffusion of nutrients and waste through blood Blood vessel: Single layer of vessels in CT. Epithelial cells forms vessel tube.
- 16. Reticular 1 CT 3 • 1- Reticular 2 cells • 2- Blood vessel • 3- Reticular fibers
- 17. Hyaline Cartilage • Often called gristle • Bluish white smokey chondrocytes looking ground substance • Numerous chondrocytes • Location: ends of long Ground S bones, ribs, nose, trachea, larynx, bronchi • For flexibility and support • Most abundant type of cartilage in body
- 18. Elastic Cartilage • Chondrocytes are located within threadlike network of elastic fibers • Location: Epiglottis of larynx, external ear, Eustachian tubes • For support and shape
- 19. Elastic vs Hyaline Cartilage Lacuna (hollow space holding chondrocyte) chondrocyte Smoother Appearance Of ground Elastic fibers throughout substance Ground substance
- 20. Adipose Tissue • Adipocytes, “signet ring” cells with peripheral nuclei. • For storage of triglycerides, to reduce heat loss, and serve as an energy nucleus reserve. • Location: under skin, around heart & kidneys, yellow “signet ring” marrow, behind adipocyte eyeball
- 21. Osseous Tissue (Bone) • Compact bone consists of osteons (haversion systems) that contain: – Lamellae – Lacuna – Osteocytes – Canaliculi – Central (haversion)canals • Spongy bone consists of thin plates called trabeculae filled with red marrow
- 22. Lamellae Central(Haversion) Haversion Canal System Lacunae
- 23. Lacunae (where osteocytes reside) Canaliculi: small Tunnels where osteocyte processes run for diffusion of nutrients and wastes
- 24. Skeletal Muscle Tissue • Striated – Proteins • Actin Striations • Myosin • Multinucleated • Voluntary • Attach to bones • For movement, communication, posture, heat production
- 25. Skeletal muscle fiber with multiple nuclei
- 27. Smooth (Visceral) Muscle Tissue • No striations • Spindle-shaped • Single centrally located nucleus • Nucleus is long and cigar shaped • Involuntary • Viscera • Walls of hollow structures – Blood vessels – Airways to lungs – Stomach – Intestines – Gallbladder – Urinary bladder
- 28. Cigar shaped nuclei of smooth muscle tissue
- 29. Smooth Muscle
- 30. Cardiac Muscle Tissue • Striated, mono- nucleated, branching • Self excitatory • Intercalated discs Intercalated disc attach fibers together and contain gap junctions (help with nucleus conduction of electrical signals)
- 31. Name the tissues and structures you see.