About The Human Heart

 

The human heart


The human heart is an organ that pumps blood throughout the body via the circulatory system, supplying oxygen and nutrients to the tissues and removing carbon dioxide.

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 into two chambers. The upper chamber is an atrium and the lower chamber is called a ventricle. The two atria act as a receiving chamber for the blood entering the heart the more muscular ventricles pump the blood out of the heart.

Structure of the heart wall

·         Epicardium- the epicardium is the outermost layer of the heart. It is composed of a thin-layered membrane that serves to lubricate and protect the outer section.

·         Myocardium- this is a layer of muscle tissue and it constitutes the middle layer wall of the heart.  It contributes to the thickness and is responsible for the pumping action.

·         Endocardium- it is the innermost layer that lines the inner heart chambers and covers the heart valves, Furthermore, it prevents the blood from sticking to the inner walls, thereby preventing potentially fatal blood clots.

 The heart weighs between 7 and 15 ounces.  By the end of a long life, a person’s heart may have beaten more than 3.5billion times. In fact, each day, the average heart beats 1000,000 times pumping about 2,000 gallons of blood.

The function of the heart

The function of the heart in any organism is to maintain a constant flow of blood throughout the body. This replenishes oxygen and circulates nutrients among the cells and tissues.

1-one of the primary functions of the human heart is to pump blood throughout the body.

2-blood delivers oxygen, hormones, glucose, and other components to various parts of the body, including the human heart.

3-the heart also ensures that adequate blood pressure is maintained in the body.

The internal structure of the heart

 In humans and other mammals and in birds, the heart is four-chambered. In humans, it is situated between the two lungs and slightly to the left of center, behind the breastbone; it rests on the diaphragm, the muscular partition between the chest and the abdominal cavity.

The heart has four chambers;

1-      The right atrium receives blood from the veins and pumps it to the right ventricle.

2-      The right ventricle receives blood from the right atrium and to the lungs, where it is loaded with oxygen.

3-      The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle.

4-      The left ventricle pumps oxygen-rich blood to the rest of the body. The left ventricle’s vigorous contractions create our blood pressure.

  Facts about human heart

·         The heart pumps around 5.7litres of blood in a day throughout the body.

·         The heart is situated at the center of the chest and points slightly towards the left.

·         On average male heart weights around 280 to 340 grams. In females, it weighs around 230 to 280 grams.

·         An adult heart beats about 60 to 100 times per minutes and newborn babies’ heartbeats at a faster pace than an adult which is about 90 to 190 beats per minute.

Comments

Post a Comment

Popular posts from this blog

conjoined twins

Image
  Content Overview Symptoms Cause Risk How twin are join Sex life of conjoined twin Overview Conjoined twins are two babies who are born physically connected to each other. Conjoined twins may   share one or more internal organs. Many conjoined twins are not alive when born or die shortly after birth. Conjoined twins are identical twins joined in uterus. A very phenomenon, the ranged from 1 in 49,000 births to 1 in 186,000 births in a somewhat higher incidence in southwest Asia and Africa. Approximately half are one third die within 24 hours. Most live births are female, with a ratio 3.1. Symptoms There are no specific signs or symptoms that indicate a conjoined twin pregnancy. As with other twin pregnancies, the uterus may grow faster than with a single baby, there may be more fatigue and vomiting early in the pregnancy. Causes There are two theories about the development of conjoined twins. The first is that a single fertilized egg does not fully ...
Read more

Anuptaphobia: fear of being Alone explained by Shreya

Image
  Anuptaphobia From a,-nuptial,-phobia Meaning The fear of remaining single or unmarried or being married to the wrong person. Anuptaphobia –the fear of being single Anuptahobia is the irrational fear of staying single or of not being in a romantic relationship with anyone. People who suffer from this condition may experience very intense anxiety as a result of their fear of being alone. Their anuptaphobia may be so severe that they may almost ever be single. Someone with anuptaphobia may irrationally fear that they may end up being single for the rest of their lives or that they will die old and alone. Such fears are very much out of touch with reality as no one can predict the future. In   fact, all people can suffer from a certain fear of being single in many moments of our lives. Especially in those moments when we end a relationship or start having problems with our partner, we can feel a certain fea...
Read more

Blogger

Image
  Blogging   Blogging refers to writing, photography, and other media that are self-published online. It is a discussion or informational website published on the World Wide Web consisting of discrete, often informal diary-style text entries. For example – blogging is when you write an online journal about the progress of your new home build. Blogging is just like expressing our thoughts. It just likes the same as writing a diary, but in blogging, we have to write something about a specific context. The blog can be used as a website where you can help people by answering their questions. Google blogger is one of the most used blogging platforms. Many advantages and disadvantage of blogging, let’s see the advantage and disadvantage of    blogging; Advantage Many people can ask you a question, you can earn money by monetizing your blog, expressing your thoughts, writing, articles, etc. 1-       Become your own boss -you are your bos...
Read more

Oxytocin {the love hormone}

Image
  Oxytocin [the love hormone] Content ·          Oxytocin ·          Formula ·          Importance ·          The love hormone ·          Oxytocin in female ·          Oxytocin in male ·          Problem with oxytocin production ·          How oxytocin production is controlled?   Oxytocin is a peptide hormone and neuropeptide. It is normally produced in the hypothalamus and released by the posterior pituitary. It plays a role in social bonding, reproduction childbirth, and the period after childbirth. Oxytocin is released into the bloodstream as a hormone is responded to love. It is sometimes referred to as love hormones because of levels ...
Read more

An Interview with National Award Winner Mr. Tribhuwan Datt Maurya

Image
The national award for teachers is the national award to teachers awarded by the president of India on 5 September every year to give public recognition to meritorious teachers working in primary, middle, and secondary schools in India.  The award is given to those teachers who have to improve the level of school education in a country. In the year 2009 President of India, Pratibha Devi Singh Patil presented the national award to teacher Mr.Tribhuwan Datt Maurya in the presence of HRD minister Kapil Sibal.  The award carries a silver medal, a certificate, and 25K INR in cash. Mr. Tribhuwan Datt Maurya is a good teacher and a strong communicator. He built strong relationships among their students and showed that they care about them. As a benefactor, he denoted 80% of his salary to help the poorest students of the poorly equipped and overcrowded school who could not afford uniforms and books.  He said it was his resolve to work with dedication, selflessness, community rega...
Read more

Infatuation

Image
Infatuation Synonyms of infatuation Crush, mash, passion A feeling of foolish or obsessively [ meaning – in a way that involves thinking about something or someone or doing something, too much or all time] strong love for, admiration for, or interest in someone or something strong and unreasoning attachment. It is the state of being carried away by an unreasoned passion, usually towards another person for whom one has developed strong romantic or platonic feelings. Infatuation is when you find somebody who is absolutely perfect. Infatuation is when you first see someone that you are attracted to and immediately feel there is a connection based on that. Example of infatuation in a sentence; ·          This is virtual infatuation, not real love Infatuation is falling in love with or becoming extremely interested in someone or something for a short time. If you have an infatuation with a particular singer, you probably listen to her o...
Read more