© 2012 Pearson Education, Inc. Figure 3.18a Nucleus of squamous epithelial cell Basement membrane (a) Diagram: Simple squamous Photomicrograph: Simple.

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© 2012 Pearson Education, Inc. Figure 3.18a Nucleus of squamous epithelial cell Basement membrane (a) Diagram: Simple squamous Photomicrograph: Simple squamous epithelium forming part of the alveolar (air sac) walls (185×). Nuclei of squamous epithelial cells Air sacs of lungs

© 2012 Pearson Education, Inc. Figure 3.18b (b) Diagram: Simple cuboidal Nucleus of simple cuboidal epithelial cell Photomicrograph: Simple cuboidal epithelium in kidney tubules (250 × ). Basement membrane Connective tissue Basement membrane Simple cuboidal epithelial cells

© 2012 Pearson Education, Inc. Figure 3.18c Nucleus of simple columnar epithelial cell Connective tissue Photomicrograph: Simple columnar epithelium of the small intestine (430×). Basement membrane (c) Diagram: Simple columnar Basement membrane Goblet cell Simple columnar epithelial cell

© 2012 Pearson Education, Inc. Figure 3.18d Pseudo- stratified epithelial layer Basement membrane (d) Diagram: Pseudostratified (ciliated) columnar Photomicrograph: Pseudostratified ciliated columnar epithelium lining the human trachea (430×). Pseudo- stratified epithelial layer Basement membrane Connective tissue Cilia

© 2012 Pearson Education, Inc. Figure 3.18e Stratified squamous epithelium Basement membrane (e) Diagram: Stratified squamous Photomicrograph: Stratified squamous epithelium lining of the esophagus (140×). Connective tissue Stratified squamous epithelium Nuclei Basement membrane

© 2012 Pearson Education, Inc. Figure 3.18f Transi- tional epithelium Basement membrane Photomicrograph: Transitional epithelium lining of the bladder, relaxed state (215×); surface rounded cells flatten and elongate when the bladder fills with urine. (f) Diagram: Transitional Connective tissue Transitional epithelium Basement membrane

© 2012 Pearson Education, Inc. Figure 3.19a Bone cells in lacunae (a) Diagram: Bone Photomicrograph: Cross-sectional view of ground bone (300×). Lamella Lacunae Central canal

© 2012 Pearson Education, Inc. Figure 3.19b Chondrocyte (Cartilage cell) Lacunae (b) Diagram: Hyaline cartilage Photomicrograph: Hyaline cartilage from the trachea (500×). Matrix Chondrocyte in lacuna

© 2012 Pearson Education, Inc. Figure 3.19c Chondro- cites in lacunae Collagen fibers (c) Diagram: Fibrocartilage Photomicrograph: Fibrocartilage of an intervertebral disc (110×). Collagen fiber Chondrocytes in lacunae

© 2012 Pearson Education, Inc. Figure 3.19d Ligament Tendon Collagen fibers Nuclei of fibroblasts (d) Diagram: Dense fibrous Photomicrograph: Dense fibrous connective tissue from a tendon (500×). Nuclei of fibroblasts Collagen fibers

© 2012 Pearson Education, Inc. Figure 3.19e Mucosa epithelium Lamina propria Fibers of matrix Nuclei of fibroblasts (e) Diagram: Areolar Photomicrograph: Areolar connective tissue, a soft packaging tissue of the body (300×). Fibroblast nuclei Collagen fibers Elastic fibers

© 2012 Pearson Education, Inc. Figure 3.19f Nuclei of fat cells Vacuole containing fat droplet (f) Diagram: Adipose Photomicrograph: Adipose tissue from the subcutaneous layer beneath the skin (430×). Vacuole containing fat droplet Nuclei of fat cells

© 2012 Pearson Education, Inc. Figure 3.19g Spleen Reticular cell Reticular fibers Blood cell (g) Diagram: Reticular Photomicrograph: Dark-staining network of reticular connective tissue (430×). White blood cell (lymphocyte) Reticular fibers

© 2012 Pearson Education, Inc. Figure 3.19h Neutrophil (white blood cell) Red blood cells Monocyte (white blood cell) Photomicrograph: Smear of human blood (1300×)(h) Diagram: Blood White blood cell Red blood cells Blood cells in capillary

© 2012 Pearson Education, Inc. Figure 3.20a Nuclei Part of muscle fiber (a) Diagram: Skeletal musclePhotomicrograph: Skeletal muscle (approx. 300×).

© 2012 Pearson Education, Inc. Figure 3.20b Intercalated discs Nucleus (b) Diagram: Cardiac musclePhotomicrograph: Cardiac muscle (430×).

© 2012 Pearson Education, Inc. Figure 3.20c Smooth muscle cell Nuclei (c) Diagram: Smooth musclePhotomicrograph: Sheet of smooth muscle (approx. 300×).

© 2012 Pearson Education, Inc. Figure 3.21 Brain Spinal cord Nuclei of supporting cells Cell body of neuron Neuron processes Diagram: Nervous tissue Photomicrograph: Neurons (150×) Nuclei of supporting cells Cell body of neuron Neuron processes