Textbook Notes (367,752)
Canada (161,368)
UOIT (554)
Elita P. (2)
Chapter

A&PII Ch 21 Anatomy of the Cardiovascular System.docx

2 Pages
80 Views
Unlock Document

School
Department
Health Science
Course
HLSC 1201U
Professor
Elita P.
Semester
Winter

Description
Ch 21Anatomy of the Cardiovascular System Pericardium - Covering of the heart functions to protect against friction - Fibrous pericardium – Tough, loose-fitting inextensible sac, outer layer - Serous pericardium – Parietal layer lies inside the fibrous pericardium and visceral layer (epicardium) adheres to the outside of the heart - Pericardial space contains 10 – 15 ml of pericardial fluid - Epicardium – considered the outer layer of the heart wall/inner heart and heart layer - Myocardium – delicate, inner layer of endothelial tissue Structure of the heart - The heart has 4 chambers – 2 atria and 2 ventricles - 2 atria: Superior chambers receive blood from veins and pump it into ventricles - Thin myocardium – low pressure (small distance) - 2 ventricles: Inferior chambers receive blood from atria, pump it into arteries - Right ventricle pumps blood into lungs - Medium myocardium – medium pressure (medium distance) - Left ventricle pumps blood to entire body - Thick myocardium – high pressure (long distance) Heart valves - SL valves prevent backflow into the ventricles; pulmonary valve and aortic valve - Atrioventricular (AV) valves prevent backflow into the atria; tricuspid valve and mitral valve Coronary circulation - Coronary arteries – first branch off the aorta; each ventricle receives blood only from a small branch of a coronary artery, few anastomoses - Cardiac veins; generally parallel to arteries, most veins drain into the coronary sinus to the right atrium Blood vessel structure - Layers: tunica externa – found in arteries and veins (tunica adventitia), fibrous connective tissue/collagen fibers - Tunica media – found in arteries and veins, smooth muscle/elastic membrane - Tunica itima – found in all blood vessels; only layer pre
More Less

Related notes for HLSC 1201U

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit