PHYSCI 5 Lecture Notes - Lecture 16: Left Coronary Artery, Right Coronary Artery, Coronary Circulation
Chapter 7 Cardiovascular system
● Diseases -- Most are lifestyle related and thus preventable
- Lack of physical activity
- Lack of proper diet
- Obesity is a marker, a disease
● Assessed through lipid panel
- Why does it lead to heart attack or stroke and how can one prevent it
Cardiovascular system
● Heart
- Muscle pump that contract and relaxes that delivers blood to other organs /
increase pressure
- Relaxing - filling up with blood
- Contracting - sending blood outward
- Must have input → pump → output
- Chambers
-
-Atria receive blood and ventricles send the blood
- Cells take blood /dump into R atrium → R ventricle → lungs through pulmonary
artery
- Lungs → L Atrium → L Ventricle → body through aorta
- Any cell in body needs oxygen
- How does the heart get nourished with blood
- Coronary arteries
- Active - cells get enough nutrients
- Stroke
- Inadequate delivery of blood to the brain
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PHYSCI 5 Full Course Notes
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Document Summary
Diseases -- most are lifestyle related and thus preventable. Why does it lead to heart attack or stroke and how can one prevent it. Muscle pump that contract and relaxes that delivers blood to other organs / increase pressure. Must have input pump output. Atria receive blood and ventricles send the blood. Cells take blood /dump into r atrium r ventricle lungs through pulmonary artery. Lungs l atrium l ventricle body through aorta. How does the heart get nourished with blood. Cells cannot make energy molecules anymore and die. Right coronary artery - delivers most to right side. Left anterior descending artery that delivers to cells in front of body. Start to get fat deposits plaques diameter of blood vessel got smaller and we deliver a little bit less! Delivery gets smaller and smaller and smaller. Until atherosclerosis (stiff) - disease of blood vessel. Hardened, lose flexibility and break like a pipe.
