What is the clinical importance of the lines of cleavage of the skin?
What will be an ideal response?
Lines of cleavage are important because a cut that runs parallel to a cleavage line will usually remain closed, whereas a cut at right angles to a cleavage line will sever elastic fibers in the skin and thus be pulled open as they recoil. A parallel cut will heal faster and with less scarring than a cut at right angles to cleavage lines.
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Inside the cranium, the vertebral arteries fuse to form the ________, which continues along the ventral surface of the brain.
A) occipital artery B) posterior cerebral artery C) cerebral arterial circle D) basilar artery E) middle cerebral artery
The body's thermostat, which constantly regulates body temperature, is located within the hypothalamus
Indicate whether the statement is true or false
In what form is the body's largest pool of calcium?
A. embedded in collagen in many types of connective tissue B. blood, dissolved within the plasma C. skeletal muscle, stored in terminal cisternae D. bones, in the form of hydroxyapatites E. liver, inside the endoplasmic reticulum
The head of a sperm is mostly
A. nucleus. B. mitochondria. C. cytoskeleton. D. cell membrane.