Discuss the layers, chambers, valves, vasculature, or the conduction system of the heart
Ans) The wall of the heart consists of three layers: the epicardium (external layer), the myocardium (middle layer) and the endocardium (inner layer). The epicardium is the thin, transparent outer layer of the wall and is composed of delicate connective tissue.
- In humans, other mammals, and birds, the heart is divided into four chambers: upper left and right atria and lower left and right ventricles. Commonly the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart.
- The heart has 4 valves:
The mitral valve and tricuspid valve, which control blood flow from
the atria to the ventricles.
The aortic valve and pulmonary valve, which control blood flow out
of the ventricles.
- The conducting system of the heart consists of cardiac muscle cells and conducting fibers (not nervous tissue) that are specialized for initiating impulses and conducting them rapidly through the heart (see the image below). They initiate the normal cardiac cycle and coordinate the contractions of cardiac chambers. Both atria contract together, as do the ventricles, but atrial contraction occurs first. The conducting system provides the heart its automatic rhythmic beat. For the heart to pump efficiently and the systemic and pulmonary circulations to operate in synchrony, the events in the cardiac cycle must be coordinated.
Discuss the layers, chambers, valves, vasculature, or the conduction system of the heart
Discuss the layers, chambers, valves, vasculature, or the conduction system of the heart
In humans, what is the sequence of vessels, heart chambers, and heart valves through which the blood passes when returning to the heart from the tissues and then traveling back to the tissues?
Be prepare to label heart chambers, valves, and draw the direction of blood flow
Label the Parts - Usbelthe vessels, valves and chambers of the heart by using the letters of the term 0P Richie d. Richtpulmonary wins Leatrum hatice Superior venac Pulmonary trunk L ate valve Tricuspid valve Right play Mitralbspid) valve pulmy veins onary artery h Chordatende ( 45) Nad > te to search Do e o DOO
Identify the components of the intrinsic conduction system Matching: tricuspid valve epicardium bicuspid valve myocardium chordea tendinea semilunar valve endocardium A aortic and pulmonary valve B. valve between right atrium and right ventricle C. middle layer of the heart, cardiac muscle tissue D. attached to bicuspid and tricuspid valves E valve between left atrium and left ventricle F. deepest layer of the heart, lines heart chambers G. outer layer of the heart, also called visceral pericardium I Forum
Answer the questions in the photo.
1. Please identify the 4 chambers of the heart, and the 4 valves that regulate flow through the heart and out of the heart. 2. Describe how the heart sounds (S1 and S2) relate to our understanding of the cardiac cycle. How does this correlate with the EKG tracing? Why is this coordination critical in enabling the heart to develop pressure gradients, and maintain adequate cardiac output? 3. We discussed the Frank-Starling Law of...
2. Name the three layers that make up the heart wall. 3. Of the two ventricles, which is more muscular? How does this difference correlate with its function? 57 4. Name the structures through which the blood flows in the following diagram: aorta, aortie semilunar valve, bicuspid valve,L. atrium, L. ventricle, pulmonary arteries, pulmonary semilunar valve, pulmonary trunk, pulmonary veins, R. ventricle, tricuspid valve, and vena cavae R. Atrium Heart chambers Heart valves Body cells Blood vessels Lungs 5. What...
2.2 Fill in the Table: Animal Number of Heart Chambers (e.g., 3) Separate Pulmonary System? (yes or no) Perch Frog Pig Pigeon 2.3 Drawing: Diagram the three (2, 3 & 4 chambers) systems of the fish, frog and pig showing in outline: the gill or pulmonary systems, the systemic systems and the heart structures. Indicate the structures for gas exchange. 2 Chambers 3 Chambers 4 Chambers 3.3. Questions: 1. Explain how the pulmonary circuit shows vertebrate adaptations to life on...
How does understanding the structures and conduction system of the heart help us as RT's (Respiratory Therapists) when caring for our patients?
1. Describe the 3 layers of pericardium. 2. Trace a drop of blood thru the heart. 3. Explain how pressure changes influence valve positions for both AV valves and SL valves. 4. Define a pacemaker potential. How does it relate to an action potential for the intrinsic conduction system? 5. Follow the intrinsic conduction pathway and describe how the remaining 99% of the cardiac cells are stimulated. How is the action potential in the intrinsic cells different from the action...