Tag: ventricle

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Cat Heart – In Situ

An “in situ” view is one that leaves the structure in it’s original place.  In the view below, the heart of the cat has been cut to reveal the left and right ventricle.  Note that the left ventricle has a much thicker muscular wall.  This is because it …

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 …

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 …

Aorta and Pulmonary Vessels

Often students mistake the pulmonary artery for the aorta.  The pulmonary artery, or pulmonary trunk, is the most anterior vessel found on the heart; it is indicated below with a blue pencil.  The aorta lies behind the pulmonary trunk, indicated with the red pencil. When the heart is …

Brain – Corpus Callosum and Ventricles

This bisected brain shows the major features of the midbrain and brain stem.  The corpus callosum is just been the cortex of the brain and connects the left and right hemispheres.    The lateral ventricle is a fluid filled space found below the corpus callosum and just about …

Dissection of the Sheep Heart

The vessels of the heart are identified in this video: aorta, pulmonary trunk, brachiocephalic, and the vena cava.  The heart is then cut in half the the internal structures are revealed: the atria,  ventricles, bicuspid and tricuspid.

Heart, Biscuspid

This dissected heart shows the left ventricle and the muscular wall of the septum.  The left side of the heart is much more muscular than the right side of the heart, which is why we seem to feel our heartbeat more on the left side of the chest. …