A student is comparing two epithelial tissues. One tissue fo…
A student is comparing two epithelial tissues. One tissue forms the outermost protective covering of the body. It consists of many layers, and the most superficial cells are flattened, lack nuclei, and create a tough, water-resistant barrier. The other lines the urinary bladder, can stretch, and has rounded, umbrella-like surface cells when relaxed. These descriptions refer to:
Read DetailsA 16-year-old athlete presents to the emergency department a…
A 16-year-old athlete presents to the emergency department after falling during football practice. X-rays of his right femur show a transverse fracture occurring in the central, elongated shaft portion of the bone between the proximal and distal ends. The orthopedic physician explains that this region primarily consists of compact bone and contains the medullary cavity filled with yellow marrow. The elongated, cylindrical shaft of a long bone is called the:
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