The semilunar valves prevent the backflow of blood from the

arteries to the ventricles.
veins to the atria.
ventricles to the atria.
arteries to the atria.


arteries to the ventricles.

Anatomy & Physiology

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Discuss the role of orexin in keeping us awake

What will be an ideal response?

Anatomy & Physiology

Using the biceps brachii to flex the forearm requires innervation of the _____ nerve

A. radial B. musculocutaneous C. ulnar D. median E. axillary

Anatomy & Physiology

The heart is located in a subdivision of the thorax called the ________

A) epigastric cavity B) pleural cavity C) mediastinum D) dorsal cavity

Anatomy & Physiology

The triangular area within the urinary bladder that is delimited by the openings of the ureters and the urethra is called the __________

Fill in the blank with correct word.

Anatomy & Physiology