Learn about cardiac muscle tissue and its unique structure, function, and role in the heart's blood pumping and electric signal transmission.
The muscle cells of the heart display fluted ends that interdigitate with each other as they line up end to end and form specialized interdigitating junctions, known asintercalated disks(Fig. 8.10). Eachintercalated diskhas: • Alateral portionthat is well endowed withgap junctions ...
cardiac pacemaker,SA node,sinoatrial node,pacemaker- a specialized bit of heart tissue that controls the heartbeat papillary muscle- any of several muscles associated with the atrioventricular valves; "the papillary muscles contract during systole to prevent regurgitation of blood into the atria" ...
structural support for cardiomyocytes and sustain the homeostasis of the cardiac extracellular matrix [13]. Mural cells in the vessel wall include smooth muscle cells and pericytes, which are vital for vascular integrity and cardiac function [14]. ECs constitute the inner layer of blood and ...
SLIDE NAME MH 070 Cardiac Muscle Cells TISSUE Heart Right and Left Ventricles (human) STAIN Hematoxylin & Eosin FIXATIVE Zenker's Formaldehyde IMAGE SIZE 83,240 x 47,745 pixels 15 GB FILE SIZE 769 MB OBJECTIVE 40x PIXEL SIZE 0.3171 µm ...
Cardiacconductionsystem•Specializedmusclecells“pace”therestoftheheart;cellscontainlessactinandmyosin,arethinandpalemicroscopically•Sinoatrial(SA)node;paceofabout65bpm•InternodalpathwaysconnectSAnodetoatrioventricular(AV)node•AVnodecouldactasasecondarypacemaker;autorhythmicatabout55bpm•BundleofHis•Left...
The sinoatrial node, a cluster of specialized pacemaking cells in the right atrium of the heart, spontaneously generates an electro-chemical wave that spreads through the atria and through the cardiac conduction system to the ventricles, initiating the contraction of cardiac muscle essential for ...
Muscle tissue:Muscle tissue is a soft tissue composed of elongated cells known as muscle fibers. These tissues are responsible for the contractions that allow our bodies and organs to contact and relax. This occurs largely due to the presence of specialized proteins known as contractile...
they are generally much smaller than the contractile cells and have few of the myofibrils or filaments needed for contraction. Their function is similar in many respects to neurons, although they are specialized muscle cells. Myocardial conduction cells initiate and propagate the action potential (the...