Biol 235 - Midterm 1 Study Guide Graded A+

ribs {Ans: numbered 1-12 from superior to inferior, give structural support to the sides of the thoracic cavity. ncrease in length from the first through seventh, and then decrease in length to rib 12}body {Ans: middle portion of sternum, also largest portion}endochondral ossification {Ans: one of the patterns of embryonic/fetal bone formation; bone forms within hyaline cartilage that develops from mesenchyme}vertebrae - numbers at childhood and adulthood {Ans: during early development - 33 adult vertebral column - 26}bone {Ans: organ made up of several different tissues working together (bone tissue, cartilage, dense connective tissue, epithelium, adipose tissue, nervous tissue)}articular cartilage {Ans: thin layer of hyaline cartilage covering the part of the epiphysis where the bone forms an articulation ( joint) with another bone. Articular cartilage reduces friction and absorbs shock at freely movable joints.}sphenoid bone {Ans: lies at the middle part of the base of the skull, called the keystone of the cranial floor because it articulates with all the other cranial bones, holding them together. Resembles a butterfly with outstretched wings}interosteonic (Volkmann's/perforating) canals {Ans: canals that penetrate compact bone as patways fo blood vessels and nerves from periosteum}pelvic (hip) girdle