Atrio-ventricular valve which is a two flap bicuspid valve present between left auricle and left ventricle and stops back flow of blood from ventricle to auricle.
The Pulmonary Circulation 3. Impulses travel along bundle of HIS on to ventricles. The narrow end of the triangular heart is pointed to the left side, during working this end gives a feeling of the heart being on the left side.
Blood from all parts of the body is collected and gets poured into the right atrium through the two largest veins of the body, the superior and inferior venacavae.
It arises from each lung and brings oxygenated blood from lungs to left auricle. Right auricle receives deoxygenated blood from the body parts by anterior and posterior vena cava. Essay on the structure and functions of Heart for students Ashiya Advertisements: Heart Sound One can hear two heart sounds for each heart beat or cardiac cycle.
The pulmonary circulation is concerned in carrying deoxygenated blood from the right side of the heart to the lungs and again bringing oxygenated blood from the lungs to the left part of the heart. The other two valves work for the ventricles. Every time the heart pumps blood into arteries, they distend rhythmically.
The oxygen-poor blood then travels through the tricuspid valve to the right atrium, where it is pumped through the pulmonary arteries to the lungs. Valves in the Heart: The waves of contraction is initiated by Sino-auricular node S. It is a hollow, highly muscular, cone-shaped structure located in the thoracic cavity above the diaphragm in between the two lungs.
Right and left auricles are separated from each other by an inter-auricular septum. It is located at the junction of superior vena cava with right auricle it initiates and maintains the myocardial activity and its rhythmicity, called pace maker of heart.
The lower chamber on each side is called the ventricle and is the discharging chamber from which the blood is driven into the arteries.
Hence, the digested food stuff in the alimentary canal are absorbed into the capillaries which go to make up the portal vein and are carried by it into the liver.
This is also known as systemic circulation. However, the blood leaving each of these places has a very different destination, to be discussed later. It tilts obliquely, a little more to the left than the right and presents a circular base above and an apex below.
Located at the point of origin of aorta from left ventricle. The final component of the heart is the septum. The pulmonary artery passes through the walls of the heart and divides into left and right pulmonary artery.
These valves are formed by three half-moon shaped semi lunar cusps. Node situated on inner wall of right auricle. It weights about gm.
The endocardium forms the inner linging of the heart is a thin, smooth, glistening membrane consisting of flattened epithelial cells which is continuous with the valves and with the lining of the blood vessels. Thus, the portal veins unlike all other veins in the body both commence and end as capillaries.
On each side of the heart there is one atrium and one ventricle, thus referred to as the left atrium, left ventricle, right atrium and right ventricle.
The valve separating the right atrium from the right ventricle is known as the right artrio- ventricular valve tricuspid valve and is made up of three flaps or cusps.
Once in the lungs, the blood undergoes a gas exchange by receiving oxygen and leaving behind carbon dioxide. Zoll an American developed a technique for pacing the heart through the pace-maker, intact into the chest.
Systole of auricle — 0. Node along interventricular septum at the top.
In each lung the capillaries carrying oxygenated blood join up and form two vein, so, two pulmonary veins from each lung, therefore becomes four pulmonary veins which return oxygenated blood to the left atrium of the heart. The function of the heart is to maintain a constant circulation of blood throughout the body.
It brings deoxygenated blood from posterior or lower body parts i. The arterial or oxygenated blood is collected from each lung by four pulmonary veins, which empty their content into the left atrium of the heart.The Human Heart The Human Heart is one of the most important organs in the entire human body.
The heart is a muscular organ that acts like a pump to continuously send blood through the body. The heart beats approximately about seventy-two times per minute of our lives.
The heart is supplied with arterial blood by the right and left coronary arteries.
On the contrary, its deoxygenated blood or the venous return is by the coronary sinus which empties into the right atrium. Functions: The function of the heart is to maintain a constant circulation of blood throughout the body. The Human Heart The human heart has four chambers.
On each side of the heart there is one atrium and one ventricle, thus referred to as the left atrium, left ventricle, right atrium and right ventricle/5(1). The human heart is slightly bigger than the size of ones fist. It is situated at a very safe place which is between the cage bones, i.e., in the center of the chest.
Usually it is slightly on the left side of the chest but in rare cases, it can be found on the right side. - Human Heart Discuss the ways in which a novelist explores the condition of the human heart in a novel you have studied. In the novel “The great Gatsby”, the novelist F.
Scott. The Human Heart Words | 4 Pages. The human heart is slightly bigger than the size of ones fist. It is situated at a very safe place which is between the cage bones, i.e., in the center of the chest. Usually it is slightly on the left side of the chest but in rare cases, it can be found on the right side.Download