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Human Anatomy--Intro to the Cardiovascular System

by: Isabella Bowling

Human Anatomy--Intro to the Cardiovascular System Anatomy 2300

Marketplace > Ohio State University > Anatomy > Anatomy 2300 > Human Anatomy Intro to the Cardiovascular System
Isabella Bowling
GPA 3.793

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About this Document

These notes cover Dr. Burgoon's online lecture #11
Human Anatomy
Dr. Burgoon
Class Notes
Human, anatomy, Cardiovascular, Heart, system
25 ?




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This 2 page Class Notes was uploaded by Isabella Bowling on Friday June 3, 2016. The Class Notes belongs to Anatomy 2300 at Ohio State University taught by Dr. Burgoon in Spring2015. Since its upload, it has received 16 views. For similar materials see Human Anatomy in Anatomy at Ohio State University.


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Date Created: 06/03/16
Anatomy 2300Lec#11 INTRO TO CARDIOVASCULAR SYSTEM Cardiovascular (circulatory) System --Major components 1. Heart… a double pump. 2. Blood vessels… ~60,000 miles of vessels in the body 3. Blood… the transport medium for nutrients, oxygen, waste products, and hormones Pulmonary and Systemic Circuits --Left side of the heart --Pump for the systemic circuit --Left atrium = receives oxygenated blood (coming from lungs) --Left ventricle = discharges oxygenated blood into the systemic circuit --Right side of heart --Pump for the pulmonary circuit --Right atrium = receives deoxygenated blood (coming in from the body) --Right ventricle = discharges deoxygenated blood into the pulmonary circuit Blood Vessels --Three major types 1. Arteries… carry blood away from the heart; carries oxygenated blood in the systemic circulation; carries oxygen-poor (i.e. deoxygenated) blood in the pulmonary circuit; smallest artery = arteriole. 2. Capillaries…. The smallest of blood vessels; thin walls make for easy diffusion; their main role is to allow for the exchange of materials between blood and body tissues 3. Veins… carry blood towards the heart; carries oxygen-poor blood in the systemic system; carries oxygenated blood in the pulmonary circulation; smallest vein is a venule. Heart  Arteries  Arterioles  Capillaries  Venules  Veins Heart Largest blood pressure ---------------------------------- lowest blood pressure --Three types of Arteries 1. Elastic or Conducting Arteries… the largest in diameter, will be found closest to the heart as blood exits the heart. Walls contain large amounts of elastic fibers, allows arteries to expand and recoil  important vessels in helping to propel blood onward while ventricles are relaxing. Helping to keep the flow continuous. --The aorta is the major example. 2. Muscular or Distributing arteries… medium-sized arteries, walls contain large amounts of smooth muscle  important in regulating the blood flow to specific body regions. Smooth muscle cells in circular orientation and are responsible for vasoconstriction and vasodilation. They can control where and how much blood is allowed to go to an area. 3. Arterioles… small arteries. --Capillaries --Connect arterioles to venules. The SMALLEST of blood vessels. --Serve as an exchange vessel  the sites of exchange of nutrients are waste products between the blood and tissue cells. --Two types of Veins 1. Venules… formed when several capillaries unite. 2. Veins… formed when several larger venules unite. --Most veins in limbs have valves (usually in the limbs) which prevent the backflow of blood.


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