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Tissues and Systems image (Pathology Connections (Body image (Obesity (US…

- - - - Tissues form organs
        
        Organs form systems
        
        Tissues
        
        Formed when there is collection of similar cells that act together to perform function
        
        Imagine cells as bricks, placed in specific pattern to create functional walls, or tissues, of building
        
        Four main types each having a different function:
        
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        Membranes
        
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        Organs
        
        Result of two or more types of tissues organizing in such a way as to accomplish something that tissues cannot do on their own
        
        Some occur singly and some in pairs
        
        Vital ones are those you can’t live without
        
        Others, like spleen, appendix, or gallbladder, can be removed without causing problems
        
        Work as part of a system
        
        Organ systems
        
        Formed by organs that work together to accomplish something more complex than what single organ can do on its own
        
        Each is interrelated, often depending on each other for proper functioning of body
        
        Skeletal system
        
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        Muscular system
        
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        Integumentary system
        
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        Nervous system
        
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        Endocrine system
        
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        Cardiovascular system
        
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        Respiratory system
        
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        Lymphatic system
        
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        Digestive (gastrointestinal) system
        
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        Urinary system
        
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        Reproductive system
        
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- - - - Since glucose cannot be moved inside body cells, cells must burn fats and proteins in body for energy
        
        As body uses up protein, tissues start to break down, becomes difficult to produce more tissue
        
        With impaired tissue production, wounds become more difficult to heal, and infections become harder to fight
        
        Lipids released from fat so that cell can burn lipids for energy
        
        Lipids can deposit around inside walls of blood vessels (atherosclerosis develops)
        
        Deposits cause impaired blood flow to tissues
        
        Together, tissue break down, deficient blood flow, and impaired wound healing mean that diabetics prone to tissue death and gangrene; can lead to loss of toes, feet, and even legs
  - - - Because blood needed by all body systems, sepsis can lead to multi-system infection
        
        Blood can spread bacteria to organs
        
        Once bacteria get in organs, they may continue to grow, adversely affecting organ function
        
        Septic shock: decreased perfusion to organs causes drop in blood pressure
        
        Sepsis syndrome: infection causes decrease in blood perfusion to organs along with other systemic signs
        
        Signs and symptoms related to sepsis syndrome
        
        Fever
        
        Chills
        
        Tachypnea
        
        Tachycardia
        
        Skin lesions
        
        Multiple Organ Dysfunction Syndrome (MODS or multi-system failure) can develop if septic shock not quickly and effectively treated As number of involved organ systems increases, mortality rate rises; can approach 100% if continued for more than 4 hospital days, depending on patient
  - - - US population becoming increasingly overweight every year; current generation of adolescents may potentially may have shorter life span than their parents
    - - Patients avoid eating or eat too little food to sustain healthy weight Patients deny problem