Tissue. Chapter 4. Link. Tissues. Tissue: 4 Primary Tissue Types Epithelial Connective Muscle Nervous. http://www.stegen.k12.mo.us/ tchrpges / sghs / ksulkowski /images/20_Simple_Columnar_Epithelial_Tissue.jpg. Match Tissue Type to Function. Epithelial Connective Nervous Muscle.
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Forms boundaries b/w different environments
1 = simple epithelium
>1 = stratified epithelium
Note: if stratified, name according to apical layer of cells!
Photomicrograph: Simple squamous epithelium
forming part of the alveolar (air sac) walls (125x).
Note: ENDOTHELIUM AND MESOTHELIUM
(b) Simple cuboidal epithelium
Photomicrograph: Simple cuboidal
epithelium in kidney tubules (430x).
(c) Simple columnar epithelium
Photomicrograph: Simple columnar epithelium
of the stomach mucosa (860X).
(c) Simple columnar epithelium
columnar epithelium lining the human trachea (570x).
Photomicrograph: Stratified squamous epithelium
lining the esophagus (285x).
Photomicrograph: Transitional epithelium lining the urinary
bladder, relaxed state (360X); note the bulbous, or rounded,
appearance of the cells at the surface; these cells flatten and
become elongated when the bladder is filled with urine.
Secrete products into ducts
Secretions released onto body surfaces (skin) or into body cavities
Examples: mucous, sweat, oil, and salivary glands
(duct does not branch)
Compound duct structure
Duodenal glands of small intestine
example in humans
Products are secreted by rupture of gland cells
sebaceous (oil) glands
See Table 4.1
• Collagen fiber
• Elastic fiber
• Reticular fiber
Loose connective tissue
Dense connective tissue
ElasticConnective Tissue Proper
Photomicrograph: Areolar connective tissue, a
soft packaging tissue of the body (300x).
Photomicrograph: Adipose tissue from the
subcutaneous layer under the skin (350x).
Photomicrograph: Dark-staining network of reticular
connective tissue fibers forming the internal skeleton
of the spleen (350x).
Photomicrograph: Dense regular connective
tissue from a tendon (500x).
Photomicrograph: Dense irregular
connective tissue from the dermis of the
Photomicrograph: Elastic connective tissue in
the wall of the aorta (250x).
Photomicrograph: Hyaline cartilage from thetrachea (750x).
Photomicrograph: Elastic cartilage fromthe human ear pinna; forms the flexibleskeleton of the ear (800x).
Photomicrograph: Fibrocartilage of an
intervertebral disc (125x). Special staining
produced the blue color seen.
Photomicrograph: Cross-sectional viewof bone (125x).
Photomicrograph: Smear of human blood (1860x); twowhite blood cells (neutrophil in upper left and lymphocytein lower right) are seen surrounded by red blood cells.
Photomicrograph: Neurons (350x)
Photomicrograph: Skeletal muscle (approx. 460x).
Notice the obvious banding pattern and the
fact that these large cells are multinucleate.
Photomicrograph: Cardiac muscle (500X);notice the striations, branching of cells, andthe intercalated discs.
Photomicrograph: Sheet of smooth muscle (200x).
(b) Mucous membranes line body cavitiesopen to the exterior.
(c) Serous membranes line body cavitiesclosed to the exterior.
Blood clot inincised wound
Migrating whiteblood cell
Inflammation sets the stage:
• Severed blood vessels bleed and inflammatory chemicals arereleased.
• Local blood vessels become more permeable, allowing whiteblood cells, fluid, clotting proteins and other plasma proteinsto seep into the injured area.
• Clotting occurs; surface dries and forms a scab.
Figure 4.12, step 1
Organization restores the blood supply:
• The clot is replaced by granulation tissue, which restoresthe vascular supply.
• Fibroblasts produce collagen fibers that bridge the gap.
• Macrophages phagocytize cell debris.
• Surface epithelial cells multiply and migrate over thegranulation tissue.
Figure 4.12, step 2
Regeneration and fibrosis effect permanent repair:
• The fibrosed area matures and contracts; the epitheliumthickens.
• A fully regenerated epithelium with an underlying area ofscar tissue results.
Figure 4.12, step 3