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Body: An Orientation ## 1.1 Levels of Structural Organisation From smallest to largest: 1. **Chemical** — atoms → molecules 2. **Cellular** — the basic unit of life 3. **Tissue** — groups of similar cells with shared function 4. **Organ** — distinct structure with specific function 5. **Organ system** — organs that cooperate 6. **Organism

fluid intake or excess loss of body fluids. Many patients cannot

fluid volume. Selection of the appropriate access site and type of VAD is determined by a number of factors, including the following1,3: anticipated length of therapy; type of therapy, including home PN, inpatient PN, antibiotic infusion, chemotherapy, and others; past medical and surgical history, including prior

body measurements. Patient has a marfanoid appearance, with mild discomfort in the neck and trapezius muscles on palpation, as well as joint hyperlaxity. Neurological examination shows moderate neck stiffness and mild incoordination in heel-toe walking. Headache clearly improves when placed in the Trendelenburg position. Diagnostic Workup

body measurements. Patient has a marfanoid appearance, with mild discomfort in the neck and trapezius muscles on palpation, as well as joint hyperlaxity. Neurological examination shows moderate neck stiffness and mild incoordination in heel-toe walking. Headache clearly improves when placed in the Trendelenburg position. Diagnostic Workup

body measurements. Patient has a marfanoid appearance, with mild discomfort in the neck and trapezius muscles on palpation, as well as joint hyperlaxity. Neurological examination shows moderate neck stiffness and mild incoordination in heel-toe walking. Headache clearly improves when placed in the Trendelenburg position. Diagnostic Workup

bodies, intervertebral spaces, and the spinal cord are clearly defined. Panel B presents a sagittal T2 M R I of the cervical spine with an arrowhead pointing to the same area near the base of the skull. The spinal cord and surrounding fluid

bodies, intervertebral spaces, and the spinal cord are clearly defined. Panel B presents a sagittal T2 M R I of the cervical spine with an arrowhead pointing to the same area near the base of the skull. The spinal cord and surrounding fluid

bodies, intervertebral spaces, and the spinal cord are clearly defined. Panel B presents a sagittal T2 M R I of the cervical spine with an arrowhead pointing to the same area near the base of the skull. The spinal cord and surrounding fluid

body mass index; Medicaid insurance; revision procedure; active drug use; HIV/AIDs; chronic heart, kidney, or liver disease; smoking; anemia; rheumatologic disease; coagulopathy; and psychosis as risk factors for PJI.61 Diagnosis The diagnosis of PJI remains a major challenge in revision arthroplasty. Diagnosis requires a combination of clinical