BIO 1105 Study Guide - Midterm Guide: Cervical Vertebrae, Thoracic Vertebrae, Biceps
Document Summary
Protect underlying tissues from dehydration and mechanical damage. Stratified: multiple layers: upper layer is squamous, middle cuboidal, and bottom columnar skin. Pseudostratified: single layer that appears stratified b/c nuclei appear in different position within the columnar cells. Line respiratory and intestinal tracts and ducts: often have cilia and secrete fluids. Proper: dense: tightly packed collagen fibers; tendons. Loose: cells scattered within an amorphous mass of proteins that form a ground substance. Fibroblasts: produce collagen (most commonly secrete protein and elastic fibers) Reticulin: thin, branching fiber that supports spleen and lymph nodes and composes junctions b/w other kinds of tissues: macrophages: immune system"s first defense against invading organisms. Blood: maintain proper ph and transport oxygen and carbon dioxide. Chondrin: forms extracellular gelatinous matrix and keeps cartilage resilient. Collagen fibers surrounded by hard crystals of calcium salts rather than chondrin. Osteocytes: bone cells that maintain the fibrous and crystalline matrix. Lamellae: thin, concentric layers that form haversien systems or osteons.
