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What is artria?
The atria are the upper two chambers of the heart.
When it leaves the left ventricle of the heart it goes through?
the body and returns to the right artria
Exchange of nutrients and wastes with the body cells takes place by diffusion through the walls of?
artria
What separates the atrium and the ventricles?
triceps
How are the atria different from the ventricles?
ventricles takes deoxygenated blood from all parts of the body to the heart while artria suplies oxygenated blood from the heart to all parts of the body
How are the ventricles different from the atria?
ventricles takes deoxygenated blood from all parts of the body to the heart while artria suplies oxygenated blood from the heart to all parts of the body
Why there is a difference in thickness of walls between artria?
The difference in wall thickness between the atria is primarily due to their differing functions. The right atrium receives deoxygenated blood from the body and has a thinner wall, as it only needs to pump blood into the right ventricle, which then sends it to the lungs for oxygenation. In contrast, the left atrium, which receives oxygenated blood from the lungs, has a thicker wall to help push blood into the left ventricle, which then pumps it throughout the body, requiring more force. This structural adaptation reflects their respective roles in the circulatory system.
What type of cells is the hearts conduction system made of?
Cardiac muscle is a type of involuntary striated muscle found in the walls of the heart, particularly the myocardium. Cardiac muscle cells are identified as cardiac myocytes or cardiomyocytes. Cardiac muscle is one of three major types of muscle, the others being skeletal and smooth muscle. Cardiac muscle, different from skeletal muscle, is composed of separate cellular elements. A cardiac muscle cell has a large nucleus and numerous mitochondria. The elevated concentration of mitochondria reveals the huge energy burden that predominant the heart. Contractile proteins of actin and myosin myofilaments are in the cytoplasm. They form bands of varying density. The heart produces regular electrical impulses causing the muscle myofibrils to glide above one another and squeeze the cardiac muscle. Some cardiac cells are self-excitable, contracting devoid of any signal from the nervous system. Each of these cells have their own inherent contraction rhythm. A section of the human heart called the sinoatrial node, or pacemaker, sets the rate and timing that all cardiac muscle cells contract. The SA node generates electrical impulses, from the SA node spreading rapidly through the walls of the artria, causing both artria to contract in unison. The impulses also pass to another section of specialized cardiac muscle tissue, a convey point called the atrioventricular node AV bundle or artioventricular bundle or Bundle or His. This collection of heart muscle cells are also specialized for electrical conduction that transmits the electrical impulses from the AV node to the point of the apex of the fascicular branches. The fascicular branches then lead to the Purkinje fibers then conduct the signals to the apex of the heart along and throughout the ventricular walls. The Purkinje fibers form conducting pathways called bundle branches.
Top chambers of the heart?
There are two chambers at the top. There is one above each ventricle. They have been given the name atrium which means a room that leads to a larger room. The one on the right side of the heart is called the right atrium and the other is the left atrium. The ventricles are called the left and right ventricles.
What tissue is specialized to conduct electrical impulses?
Cardiac muscle is a type of involuntary striated muscle found in the walls of the heart, particularly the myocardium. Cardiac muscle cells are identified as cardiac myocytes or cardiomyocytes. Cardiac muscle is one of three major types of muscle, the others being skeletal and smooth muscle. Cardiac muscle, different from skeletal muscle, is composed of separate cellular elements. A cardiac muscle cell has a large nucleus and numerous mitochondria. The elevated concentration of mitochondria reveals the huge energy burden that predominant the heart. Contractile proteins of actin and myosin myofilaments are in the cytoplasm. They form bands of varying density. The heart produces regular electrical impulses causing the muscle myofibrils to glide above one another and squeeze the cardiac muscle. Some cardiac cells are self-excitable, contracting devoid of any signal from the nervous system. Each of these cells have their own inherent contraction rhythm. A section of the human heart called the sinoatrial node, or pacemaker, sets the rate and timing that all cardiac muscle cells contract. The SA node generates electrical impulses, from the SA node spreading rapidly through the walls of the artria, causing both artria to contract in unison. The impulses also pass to another section of specialized cardiac muscle tissue, a convey point called the atrioventricular node AV bundle or artioventricular bundle or Bundle or His. This collection of heart muscle cells are also specialized for electrical conduction that transmits the electrical impulses from the AV node to the point of the apex of the fascicular branches. The fascicular branches then lead to the Purkinje fibers then conduct the signals to the apex of the heart along and throughout the ventricular walls. The Purkinje fibers form conducting pathways called bundle branches.
How does the human heart work?
The horse's heart works basically the same as ours. Four chambers and valves between them. We are not that different at that level - humans and horses are both mammals and all mammals have similar hearts.
