The document summarizes key information about the heart, including its location in the chest cavity, basic anatomy consisting of four chambers, function of pumping blood throughout the body, electrical activity generated by the sinus node, composition of cardiac muscle, related medical specialty of cardiology, common heart diseases, and medical terminology. It provides references for additional information.

1. Marina Yusupova Biology 120: WW2 Presentation on chapter 2 Heart

2. Location Part of cardiovascular system Located in ventral thoracic cavity, which is separated from abdominal cavity by the diaphragm

3. Basic anatomy Has 4 chambers, listed in the order of blood flow: right atrium -> right ventricle -> left ventricle -> left atrium

4. Function Pumps blood throughout the entire body to transport nutrients, oxygen, and wastes The heart generates its own electrical signal, then "spreads" it across the heart, triggering the heart muscle to contract in the correct sequence

5. The heart’s electrical activity The heart's electrical signal is produced by a tiny structure known as the sinus node, which is located in the upper portion of the right atrium. From the sinus node, the electrical signal spreads across the right atrium and the left atrium, causing both atria to contract, and to push their load of blood into the right and left ventricles. The electrical signal then passes through the AVnode to the ventricles, where it causes the ventricles to contract in turn.

6. Composition Cardiac muscle is like skeletal musclein that it is striated and multinucleate, and like smooth muscle in that the nuclei are centrally located It’s different from both in that it has intercalated disks

7. Medical specialty Cardiology Physicians specializing in this field of medicine are called cardiologists. Cardiologists should not be confused with cardiac surgeons, cardiothoracic and cardiovascular, who are surgeons who perform cardiac surgery via sternotomy - open operative procedures on the heart and great vessels.

8. Heart diseases Some of the heart diseases are Heart attack, High blood pressure, Ischemic heart disease, Heart rhythm disorders, Tachycardia, Heart murmurs, Rheumatic heart disease, Pulmonary heart disease, Hypertensive heart disease

9. Medical terminology related to the heart

10. References Fremgen, B.F. & Frught, S.S. Medical terminology: A living language. http://www.cancerindex.org/medterm/medtm8.htm http://www.daviddarling.info/encyclopedia/C/cardiac_muscle.html