Epicardium: the outer protective layer of the heart. Myocardium: muscular middle layer wall of the heart. Endocardium: the inner layer of the heart.
What are the layers of the heart?
The wall of the heart separates into the following layers: epicardium, myocardium, and endocardium. These three layers of the heart are embryologically equivalent to the three layers of blood vessels: tunica adventitia, tunica media, and tunica intima, respectively.
What are the 3 layers to the heart structure?
Your heart walls have three layers: Endocardium: Inner layer. Myocardium: Muscular middle layer. Epicardium: Protective outer layer.
What are the 4 main functions of the heart?
- Pumping oxygenated blood to other body parts.
- Pumping hormones and other vital substances to different parts of the body.
- Receiving deoxygenated blood and carrying metabolic waste products from the body and pumping it to the lungs for oxygenation.
- Maintaining blood pressure.
What are the 4 valves of the heart?
- Tricuspid Valve. Has three leaflets or cusps.
- Pulmonary Valve (or Pulmonic Valve) (link opens in new window)
- Mitral Valve. Has two leaflets.
- Aortic Valve. Has three leaflets, unless it’s abnormal from birth, i.e., bicuspid aortic valve.
What are the 12 parts of the heart?
- Left atrium and auricle. Left atrium. Left auricle.
- Right atrium and auricle. Right atrium. Right auricle.
- Interventricular septum and septal papillary muscles. Interventricular septum.
- Right ventricle and papillary muscles. Right ventricle.
- Left ventricle and papillary muscles. Left ventricle.
Is pericardium a layer of the heart?
Your heart is surrounded by a double-layered membrane, called the pericardium or pericardial sac. This membrane keeps your heart in place in your chest cavity, restricts the expansion of your heart when your blood volume increases, and helps to protect your heart.
What is the middle layer of the heart called?
Myocardium – the middle, muscular layer. Endocardium – the inner layer.
Which is the correct sequence of layers in the heart wall?
The heart wall is comprised of three layers, the epicardium (outer), myocardium (middle), and endocardium (inner). These tissue layers are highly specialized and perform different functions.
Is pericardium and epicardium the same?
Anatomy. The pericardium is a dual-layered structure enveloping the heart and proximal great vessels. It consists of an inner visceral pericardium (also called the epicardium when in contact with the myocardium), and an outer parietal pericardium, composed of layers of collagen fibrils and elastin fibers.
What’s the main artery called?
The main artery is your aorta, which connects to the left side of your heart. It runs down through your chest, diaphragm and abdomen, branching off in many areas. Near your pelvis, your aorta branches into two arteries that supply blood to your lower body and legs.
What is the size of our heart?
According to Gray’s Anatomy, the heart length, width, and thickness are 12 cm, 8.5 cm, and 6 cm, respectively. In addition, the mean weight of the heart is 280-340 g in males and 230-280 g in females.
What is the heart made of?
Your heart is made up of three layers of tissue: epicardium. myocardium. endocardium.
Which artery is the largest and why?
The largest artery is the aorta, the main high-pressure pipeline connected to the heart’s left ventricle. The aorta branches into a network of smaller arteries that extend throughout the body.
What are heart strings called?
The chordae tendineae, also known as the heartstrings, are cord like tendons that connect the papillary muscles to the tricuspid and bicuspid valves of the heart. The chordae tendineae play a role in atrial and ventrical systole.
What is the largest artery in the body?
How large is the aorta? The aorta is the largest blood vessel in your body. It’s more than 1 foot long and an inch in diameter at its widest point.
What are the 10 function of heart?
The heart performs the following important functions: The primary function of the heart is to pump blood throughout the body. It supplies oxygen and nutrients to the tissues and removes carbon dioxide and wastes from the blood. It also helps to maintain adequate blood pressure throughout the body.
What is the heart in the Bible?
In the Bible the heart is considered the seat of life or strength. Hence, it means mind, soul, spirit, or one’s entire emotional nature and understanding.
What are the 5 main parts of the cardiovascular system?
The cardiovascular system, also known as the circulatory system, includes the heart, arteries, veins, capillaries and blood. The heart functions as the pump that moves blood through the body.
Which is the outermost layer of heart?
The outer layer of the heart wall is the epicardium, the middle layer is the myocardium, and the inner layer is the endocardium.
What is visceral layer?
The inner (visceral) layer of the serous pericardium lines the outer surface of the heart itself. Between the two layers of the serous pericardium is the pericardial cavity, which contains pericardial fluid. It is this fluid that provides lubrication between the two layers, and allows the heart to expand and contract.
What is the endocardium?
The endocardium is the innermost layer of the heart and lines the chambers and extends over projecting structures such as the valves, chordae tendineae, and papillary muscles.
What is the main tissue in the heart?
Cardiac muscle tissue, or myocardium, is a specialized type of muscle tissue that forms the heart.
What is the function of myocardium?
The main function of the myocardium is to facilitate the contraction and relaxation of the heart walls in order to receive and pump the blood into the systemic circulation. In addition, the myocardial cells provide a scaffold for heart chambers and conduct electrical stimuli.
What is the largest vein?
Your inferior vena cava, your body’s largest vein, carries oxygen-depleted blood back to your heart from the lower part of your body (below your diaphragm).