Explain how the anatomy of compact bone differs from that of spongy bone
What will be an ideal response?
Compact bone is composed of osteons (Haversian systems). Concentric rings of matrix, called lamellae, are situated around a central (Haversian) canal. The rings and central canal constitute an osteon, or Haversian system. Other canals, called canaliculi, spread outward from central canals to connect to lacunae which house osteocytes.
Spongy bone is open, airy, and spiky. It is composed of small, needlelike pieces of bone. Spongy bone lacks osteons and the network of canals visible in compact bone.
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Aging has what effect on the skeletal system?
A) progressive loss of processes and tuberosities B) fusion of joints, especially in the vertebral column C) loss of calcium and collagen fibers from matrix D) increase in the number of cranial foramina E) increase in adipose tissue in epiphyses
Intrinsic regulation of blood flow provides localized control of peripheral resistance.
Answer the following statement true (T) or false (F)
The ________ wraps around the stomach, small intestine, and large intestine
A) parietal peritoneum B) pericardium C) pleura D) meninges E) visceral peritoneum
Which sequence correctly traces the pathway of aqueous humor in the eye?a: Aqueous humor is secreted by epithelial ciliary cells.b: Aqueous humor is released into the posterior chamber.c: Aqueous humor is drained into the scleral venous sinus.d: Aqueous humor washes over the lens and then passes through the pupil into the anterior chamber.
A. a, c, b, d B. b, a, c, d C. d, a, c, b D. a, b, c, d E. a, b, d, c