{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

10 heart 118 - Biology 118 10 CARDIOVASCULAR PHYSIOLOGY THE...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Biology 118 10. CARDIOVASCULAR PHYSIOLOGY THE TELL-TALE HEART : Hearts are made up of cardiac muscle cells, and possess two types of chambers: Atria receive blood from outside the heart. Ventricles pump blood back out of the heart. Dual-pump systems, like in humans, consist of two of each type of chamber. THE HUMAN HEART : The left side of the heart sends blood to the systemic circuit, while the right side sends blood to the pulmonary circuit. Atria – pump blood to the ventricles. Ventricles – pump blood to the lungs or the body. Atrioventricular valves, between the atria and the ventricles, prevent backflow of blood from ventricle to the atrium. Semilunar valves, in the arteries leaving the ventricles, prevent backflow of blood back into ventricles. Coronary blood vessels – these deliver blood to sustain the heart muscle. HEART ATTACK : A heart attack is the result of the death of cardiac muscle cells and the subsequent failure of the heart to deliver enough blood to the body. Coronary arteries get blocked, and the muscle cells have no choice but to suffer and die. Angina – chest pains, likely to occur when the heart is working too hard under stress, indicating that the heart’s not receiving enough oxygen. Heart attack is likely in the future.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 2

10 heart 118 - Biology 118 10 CARDIOVASCULAR PHYSIOLOGY THE...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online