human heart

The human heart is a muscular, cone-shaped, hollow organ about the size of a fist (about 12cm in length and 9cm in breadth..

Structure - The human heart is a muscular, cone-shaped, hollow organ about the size of a fist (about 12cm in length and 9cm in breadth). The heart is situated behind the sternum, between the lungs in the thoracic cavity. The heart is tilted slightly such that..

Control of the Heart Function - The control of the heart function is by a set of muscles and is, therefore, called myogenic . If the heart is removed from a living mammal and placed in a well oxygenated salt solution maintained at 37 o C, the heart continues ..

The number of times the heart beats per minute is called heart rate. For a normal adult human it is about 72 times per minute. For infants, it is a higher figure. It also goes up during physical exercise. The contractions and relaxations that the heart chambe..

There are a pair of lungs in the thoracic cavity - the left lung and the right lung. The left lung is slightly smaller (because of the heart which is slightly to the left of the body) and has two lobes and the right lung is bigger with three lobes. They are spongy and elastic organs..

The human heart is a muscular, cone-shaped, hollow organ about the size of a fist (about 12cm in length and 9cm in breadth). The heart is situated behind the sternum, between the lungs in the thoracic cavity. The heart is tilted slightly such that its apex i..

The term 'natural resources' refers to all the natural things on our earth. It includes everything, that is naturally available and that is not creatable by any human activity. It specifically excludes the materials created by man. Human being and his anthropological history ind..

Norman Mckinnell was an actor and a dramatist. As a playwright he is known for the play. 'The Bishop's Candlesticks' which is an adaptation of a section of Victor's Hugo's "Les Miserables". The play, which is very popular, is based on the theme that love and kindness can change a man rather than v..

Introduction - Norman Mckinnell was an actor and a dramatist. As a playwright he is known for the play. 'The Bishop's Candlesticks' which is an adaptation of a section of Victor's Hugo's "Les Miserables". The play, which is very popular, is based on the theme that love and kindness can change a man..

+ve and Rh-ve, based on the presence or absence of Rhesus factor, an antigen. In human circulatory system the blood is flows in closed blood vessels called the arteries, veins and their capillaries. Arteries and veins have elastic and muscular walls. Capillaries lack muscles. Arteries ari..