The heart is a fist-sized organ that pumps blood throughout your body. It’s the primary organ of your circulatory system. Your heart contains four main sections (chambers) made of muscle and powered by electrical impulses. Your brain and nervous system direct your heart’s function.
Quiz: What Do You Know About the Human Heart?
As it’s one of the most important organs in the body, can you pass a simple quiz all about it?
left Your heart is about the size of your clenched fist. It lies in the front and middle of your chest, behind and slightly to the left of your breastbone. It is a muscle that pumps blood to all parts of your body to provide it with the oxygen and nutrients in needs to function.
What is human heart made up of?
The heart consists of several layers of a tough muscular wall, the myocardium. A thin layer of tissue, the pericardium, covers the outside, and another layer, the endocardium, lines the inside. The heart cavity is divided down the middle into a right and a left heart, which in turn are subdivided into two chambers.
What is the size of 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 are 5 functions of the heart?
The four main functions of the heart are: 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 3 main functions of the 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.
How do I know if my heart is OK?
Your heart rate should normally range between 60 to 100 beats per minute, although many doctors prefer their patients to be in the 50 to 70-beat range. If you train regularly, your per-minute heart rate may be as low as 40, which typically indicates excellent physical condition.
What's the main artery called?
the aorta 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. The arteries' smaller branches are called arterioles and capillaries.
Where do you feel heart pain?
Most heart attacks involve discomfort in the center of the chest that lasts more than a few minutes – or it may go away and then return. It can feel like uncomfortable pressure, squeezing, fullness or pain. Discomfort in other areas of the upper body.
What is the weight of human heart?
When it comes to matters of the heart, men and women definitely aren't created equal. For instance, a man's heart weighs about 10 ounces, while a woman's heart weighs approximately 8 ounces. Not only is a woman's heart smaller than a man's, but the signs that it's in trouble are a lot less obvious.
How many valves are in the heart?
four heart valves The four heart valves, which keep blood flowing in the right direction, are the mitral, tricuspid, pulmonary and aortic valves. Each valve has flaps (leaflets) that open and close once per heartbeat.
What are the 12 parts of the heart?
Anatomy 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.
What color is the heart?
red The heart is bright red in colour. However, if the heart is drained of blood, it will appear white.
What is the shape of heart?
Heart beat The human heart is a fist-sized muscle with a rounded bottom, smooth sides, and a thick arch of blood vessels at the top.
Is a male or female heart bigger?
This difference is largely accounted for by the size of the heart, which is typically smaller in females than males. The smaller female heart, pumping less blood with each beat, needs to beat at a faster rate to match the larger male heart's output.
Which part of heart contains pure blood?
The left half of the heart collects and pumps pure (oxygenated) blood from the lungs to all parts of the body. The blood from the lungs enters the heart from four veins called the Pulmonary Veins. These veins bring the blood into the left upper chamber called the Left Atrium.
What are the 4 chambers of the heart?
The four chambers of the heart On each side of the wall, there is a small collecting chamber called an 'atrium', which leads into a large pumping chamber called a 'ventricle'. There are four chambers: the left atrium and right atrium (upper chambers), and the left ventricle and right ventricle (lower chambers).
What is heart main function?
The heart is the main organ in the circulatory system, the structure is primarily responsible for delivering blood circulation and transportation of nutrients in all parts of the body.
Where is heart located?
chest cavity Overview. The heart and lungs are located in the thorax, or chest cavity. The heart pumps blood from the body to the lungs, where the blood is oxygenated. It then returns the blood to the heart, which pumps the freshly oxygenated blood to the rest of the body.
What is the normal blood pressure of the human body?
A normal blood pressure level is less than 120/80 mmHg. No matter your age, you can take steps each day to keep your blood pressure in a healthy range.