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What is the anatomy of the heart?

The Anatomy of the Heart. It is divided by a partition or septum into two halves, and the halves are in turn divided into four chambers. The heart is situated within the chest cavity and surrounded by a fluid filled sac called the pericardium. This amazing muscle produces electrical impulses that cause the heart to contract,...

What is the role of the heart in the human body?

Regina Bailey is a board-certified registered nurse, science writer and educator. Her work has been featured in "Kaplan AP Biology" and "The Internet for Cellular and Molecular Biologists." The heart is the organ that helps supply blood and oxygen to all parts of the body.

What are the 4 layers of the heart?

1 Epicardium. : The outer layer of the wall of the heart. 2 Myocardium. : The muscular middle layer of the wall of the heart. 3 Endocardium. : The inner layer of the heart. Cardiac conduction is the rate at which the heart conducts electrical impulses.

What is the difference between the heart and blood vessels?

The heart consists of four chambers, four valves, and four major vessels that work to pump blood throughout the body. The heart and blood vessels are organs that make up the circulatory system. The human body has a closed circulatory system, meaning blood pumped by the heart is contained within blood vessels.

What is the role of the heart in conduction?

Cardiac conduction is the rate at which the heart conducts electrical impulses. Heart nodes and nerve fibers play an important role in causing the heart to contract. Atrioventricular Bundle: A bundle of fibers that carry cardiac impulses. Atrioventricular Node: A section of nodal tissue that delays and relays cardiac impulses.

What is the heart surrounded by?

The heart is situated within the chest cavity and surrounded by a fluid-filled sac called the pericardium. This amazing muscle produces electrical impulses that cause the heart to contract, pumping blood throughout the body. The heart and the circulatory system together form the cardiovascular system.

Which arteries carry oxygenated blood to the head and neck?

Carotid arteries: Supply oxygenated blood to the head and neck regions of the body. Common iliac arteries: Carry oxygenated blood from the abdominal aorta to the legs and feet. Coronary arteries: Carry oxygenated and nutrient-filled blood to the heart muscle. Pulmonary artery: Carries deoxygenated blood from the right ventricle to the lungs.

What is the section of nodal tissue that delays and relays cardiac impulses?

Atrioventricular Node: A section of nodal tissue that delays and relays cardiac impulses. Purkinje Fibers: Fiber branches that extend from the atrioventricular bundle. Sinoatrial Nod e: A section of nodal tissue that sets the rate of contraction for the heart.

What are the two phases of the cardiac cycle?

The Cardiac cycle is the sequence of events that occurs when the heart beats. Below are the two phases of the cardiac cycle: Diastole phase: The heart ventricles are relaxed and the heart fills with blood. Systole phase: The ventricles contract and pump blood to the arteries.

What is the function of the Venae cavae?

Venae cavae: Transport de-oxygenated blood from various regions of the body to the heart.

What is the blood vessel?

Blood vessels are intricate networks of hollow tubes that transport blood throughout the entire body. The following are some of the blood vessels associated with the heart:

What is the function of the heart?

Your heart’s main function is to move blood throughout your body. Your heart also:

Where is the heart located?

Your heart is located in the front of your chest. It sits slightly behind and to the left of your sternum (breastbone). Your ribcage protects your heart.

What is the valve that opens between the upper and lower chambers of the heart?

The atrioventricular (AV) valves open between your upper and lower heart chambers. They include:

How big is a heart?

Everyone’s heart is a slightly different size. Generally, adult hearts are about the same size as two clenched fists, and children’s hearts are about the same size as one clenched fist.

What is the primary organ of the circulatory system?

Your heart is the primary organ of your circulatory system. It pumps blood throughout your body, controls your heart rate and maintains blood pressure. Your heart is a bit like a house. It has walls, rooms, doors, plumbing and an electrical system. All the parts of your heart work together to keep blood flowing and send nutrients to your other organs. Conditions that affect your heart are some of the most common types of conditions. Ask your healthcare provider how you can improve your heart health.

How many types of blood vessels does the heart pump?

Your heart pumps blood through three types of blood vessels:

What is the main organ of the cardiovascular system?

Your heart is the main organ of your cardiovascular system, a network of blood vessels that pumps blood throughout your body. It also works with other body systems to control your heart rate and blood pressure. Your family history, personal health history and lifestyle all affect how well your heart works.