Author: anatomycorner

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Mitral (or Bicuspid) Valve

The bicuspid and tricuspid valves are both located between the atrium and the ventricle.   They are similar in appearance and can be difficult for beginning anatomists to identify accurately.  There are a couple of different ways to remember and then locate the valves.  First, you must remember …

Vitreous Humor of the Eye

This dissected eye shows the clear gel that fill the space between the lens and the retina of the eye.  In a preserved specimen, the fluid is cloudy and thick, having the consistency of gelatin.  When the eye is cut in half, the lens can be found floating …

Rat Dissection

Students in biology are often tasked with dissecting a frog, but there are many other vertebrate models that can provide a rich experience in learning anatomy.   Common specimens include the fetal pig, shark, mink, cat, and the rat.   Rats are fairly inexpensive and are raised for …

Heart – Systole and Diastole

During the cardiac cycle, two contractions occur.  Systole occurs when the muscles contract and diastole occurs when the muscles relax.   Atrial systole occurs when the atria contract and push blood into the lower ventricles.  During this point, the aortic valve is closed.   Ventricular contraction then occurs …

Video of a Brain Dissection

This video shows the major parts of the brain, starting with the external anatomy where the pituitary gland, optic chiasma (nerves) , olfactory lobes, dura mater, and the parts of the brain stem:  midbrain, pons, medulla, and spinal cord.   The brain is the cut along the longitudinal …