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The pectinate muscles are shaped a bit like brush bristles, and their function is to allow maxium contraction of the atria using the minimal muscle mass. Papillary muscles are connected to strong tendons in the ventricles called the chordae tendinae, which gives them a lot of strength. Their purpose is to prevent prolapse of the valves in the ventricles after the ventricles contract. Prolapse means that the valves fall inward, allowing backflow of blood back into the ventricles after they have contracted, which makes for a far less efficient action of the ventricles. Prolapsed valves and the blackflow of blood caused by the valves folding onto themselves is called a "heart murmur".
What else can I help you with?
Name the structure between the left atrioventricular valve and the papillary muscle?
The chordae tendineae connect the AV valve and the papillary muscle. These structures work together to prevent backflow from the ventricle to the atrium.
What muscle is attached to the chordae tendineae?
papillary muscles
Name the structure found between the atrioventricular valve and the papillary muscle?
interventricular septum
Does the papillary muscle surround the pericardial sac?
No
Structure from which chordae tendineae originate?
Chordae tendinae is attached to papillary muscle and the valves.
Differentiate clearly between the location and appearance of pectinate muscle and trabeculae carnea?
In terms of location, the pectinate muscle can be found in the atrium, while the trabeculae carnea can be found in the ventricles. Also notice the trabeculae carnae should be thicker in the left ventricle as it is pumping blood into the systemic circuit (which has more surface area than the pulmonary circuit).
What is the muscle that attached to chordae tendinae?
papillary muscles
Where are the papillary muscle?
inside the left and right ventricle
Which chamber of the heart contains pectinate muscle in in its walls?
The right atrium contains pectinate muscles in its walls. These muscular ridges are also present in the right auricle, which is an extension of the right atrium. Pectinate muscles help increase the surface area of the atrial wall and assist in the contraction of the heart.
What muscle is found in the right atrium?
The type of muscle that is found in the right atrium is mainly the pectinate muscles. This is one of the four chambers of the heart.
Is the papillary muscle only present on the left side of the heart?
no.
What papillary muscle surrounds the pericardial sac?
There are papillary muscles IN the ventricles of the heart which keep the tricuspid and the mitral valves (AV valves) closed.
