The heart and skeleton are formed from which primary germ layer?
A. Ectoderm
B. Mesoderm
C. Endoderm
D. Hypoblast
E. Trophoblast
B. Mesoderm
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Susan and Robert are the parents of three children. One night while the family was sleeping, a fire broke out next door. Susan and Robert heard the fire trucks and rushed out to see what was happening
None of the children woke up, even with the sound of sirens close to the house. Why did the parents wake up, but the children didn't wake up? What will be an ideal response
Muscle fibers are arranged in bundles called ___________.
A. compartments B. fascicles C. retinacula D. aponeuroses E. groups
What may happen if the ductus arteriosus fails to close shortly after birth?
A. Blood may flow from the right atrium to the left atrium. B. The coronary arteries may have abnormally increased blood flow. C. The walls of the heart may become thin and flaccid. D. Blood may flow from the aortic arch to the lungs. E. Valvular stenosis may interrupt blood flow.
Which of the following is the origin of the bulbospongiosus?
A) ischial spine B) inferior ischial ramus C) linea alba and pubis D) coccyx E) collagen sheath at the base of the clitoris or penis