BELLWORK. CHAPTER 4: TISSUES 4.3 & 4.4: Muscular and Nervous Tissue.
Chapter 4.3: Tissues
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Transcript of Chapter 4.3: Tissues
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Chapter 4.3: Tissues
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Most diverse Never exposed to outside Vascular—have blood vessels Receptors for pain, pressure and
temperature
Connective Tissues
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Figure 4.7
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Support/Protection Transportation Storage of energy reserves (Adipose cells—
AKA fat cells) Defense
Functions of Connective Tissue
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Figure 4.8
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Cell Types Fibroblasts Most abundant Produce and maintain connective tissue Macrophages Engulf damaged cells and wastes Adipocytes Fat cells Mast Cells Release chemicals to start immune response
Connective Tissue Proper
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Collagen Fibers Strong and flexible Elastic Fibers Will stretch Reticular Fibers Thin
Connective Tissue Fibers
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Fills in space between cells Slows bacteria and pathogens
Ground Substance
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Figure 4.8
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Genetic Abnormal fibrillin—gives connective tissue
strength and elasticity Tall with abnormally long arms, legs and
fingers Abnormal cardiovascular system Weak aorta—may burst Sudden, fatal loss of blood
Marfan’s Syndrome
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Areolar Tissue Least specialized Increased blood supply Separates skin from muscle Pads Allows movement Supplies blood to epithelia
Loose Connective Tissue
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Figure 4.9a
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AKA: Fat Loose Connective Tissue Padding Shock absorption Insulation Energy reserve Collects in sides, buttocks, breasts and
abdomen
Adipose Tissue
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Figure 4.9b
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Weight loss = deflated adipocytes Easily regain these cells b/c the cells are
still there Liposuction—remove adipocytes
Weight Control
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Mostly collagen Tendons—attach muscles to bone Ligaments—attach bone to bone
Dense Connective Tissue
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Figure 4.9c