Structure+of+the+heart

First we’ll start with the structure of the heart:

The heart is a muscular cone-shaped organ about the size of a clenched fist of the same person. It is located in the upper body (chest area) between the lungs, and with its pointed end (called the apex) downwards, forwards, and pointing towards the left. The main purpose of the heart is to pump blood around the body. The basic structure of the heart may be described as follows: The Heart is divided into separate right and left sections by the inter-ventricular septum, or "septum". Each of these (right and left) sections is also divided into upper and lower compartments known as atria and ventricles, respectively.

The four main chambers of the heart are therefore the: Right Atrium; usually labeled as RA Right Ventricle; usually labeled as RV Left Atrium; usually labeled as LA Left Ventricle; usually labeled as LV

This image is a detailed structure and labeling of the heart's compartments:



References:
 * Lebdeh, D., Dakroub, R., Abboud Seif, N., & Geries Jarjour, Z. (2000). //Life and earth science//. Sin-El-Fil, Lebanon: Lebanese Educational Publishing Company.
 * //Bupa.// (2011). //Cardiovascular system.// Retrieved May, 27, 2011, from []
 * IvyRose Holistic.(2011).The Structure of the Heart. Retrieved May, 27, 2011, from: []
 * Patient.co.uk. (2010). //Myocardial infarction (heart attack)//. Retrieved May, 27, 2011, from []
 * The Structure Of The Heart. [video]. (2008). Retrieved May, 27, 2011, from []

**Questions to research – heart structure:**
 * 1) What are the major components / structures in the heart?
 * 2) What is the function of the valves and where are they located?
 * 3) What is the name of the medical examination performed to obtain information about the regularity of the cardiac activity?

**Leen:**

**1) Right Atrium, Left Atrium, Right Ventricle, Left Ventricle, Tricuspid Valve, Bicuspid Valve, Pulmonary Valve, Aortic Valve**

**2) Tricuspid Valve - located in the right atrium, prevents the back flow of the blood from the right ventricle back to the right atrium.** **Bicuspid Valve - located in the left ventricle, prevents the back flow of the blood from the left ventricle back to the left atrium.**  **Pulmonary Valve - located in the pulmonary vein, prevents the back flow of the blood back to the right ventricle.**  **Aortic Valve - located in the left atrium, prevents back flow of blood back into the left ventricle.**

**3) ECG- Electrocardiogram**

**Jida:** **1) RA, RV, LA, LV**

**[Dalia]**

1) Right Atrium, Left Atrium, Right Ventricle, Left Ventricle.

2) **Tricuspid Valve (in RA) prevents the back flow of the blood from the right ventricle back to the right atrium.** **Bicuspid Valve (in LV) prevents the back flow of the blood from the left ventricle back to the left atrium.** **Pulmonary Valve (in RV) prevents the back flow of the blood back to the right ventricle.** **Aortic Valve (in LA) prevents back flow of blood back into the left ventricle.**

**3)** **Electrocardiogram, commonly reffered to as ECG, obtains information about the regularity of the cardiac activity.**