Circulatory System by Ramneek Dhillon https://padlet.com/dhillonramneek/a70ieb1tozz6 en-us 2019-07-06 04:06:00 UTC 2023-04-29 08:24:20 UTC hello@padlet.com CIRCULATORY SYSTEM The circulatory system is a network consisting of blood, blood vessels, and the heart. This network supplies tissues in the body with oxygen and other nutrients, transports hormones, and removes unnecessary waste products. dhillonramneek https://padlet.com/dhillonramneek/a70ieb1tozz6/wish/370353675 The heart
The heart is made of specialized cardiac muscle tissue that allows it to act as a pump within the circulatory system.
The human heart is divided into four chambers. There are one atrium and one ventricle on each side of the heart. The atria receive blood and the ventricles pump blood.
The human circulatory system consists of several circuits:
  • The pulmonary circuit provides blood flow between the heart and lungs.
  • The systemic circuit allows blood to flow to and from the rest of the body.
  • The coronary circuit strictly provides blood to the heart (not pictured in the figure below).
Blood and blood vessels
Blood from the heart is pumped throughout the body using blood vessels. Arteries carry blood away from the heart and into capillaries, providing oxygen (and other nutrients) to tissue and cells. Once oxygen is removed, the blood travels back to the lungs, where it is re-oxygenated and returned by veins to the heart.
https://en.wikipedia.org/wiki/Circulatory_system
https://www.khanacademy.org/science/high-school-biology/hs-human-body-systems/hs-the-circulatory-and-respiratory-systems/a/hs-the-circulatory-system-review
]]> 2019-07-06 04:09:43 UTC https://padlet.com/dhillonramneek/a70ieb1tozz6/wish/370353675 HOW DOES CIRCULATORY SYSTEM WORK? dhillonramneek https://padlet.com/dhillonramneek/a70ieb1tozz6/wish/370353944  Deoxygenated blood from the body enters the right atrium. 
  • It flows through the tricuspid valve into the right ventricle. The term tricuspid refers to the three flaps of tissue that make up the valve.
  • Contraction of the ventricle then closes the tricuspid valve and forces open the pulmonary valve.
  • Blood flows into the pulmonary artery.
  • This branches immediately, carrying blood to the right and left lungs.
  • Here the blood gives up carbon dioxide and takes on a fresh supply of oxygen.
  • The capillary beds of the lungs are drained by venules that are the tributaries of the pulmonary veins.
  • Four pulmonary veins, two draining each lung, carry oxygenated blood to the left atrium of the heart.


https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book%3A_Biology_(Kimball)/Unit_15%3A_The_Anatomy_and_Physiology_of_Animals/15.03%3A_Circulatory_Systems/15.3A%3A_Anatomy_of_Human_Circulatory_System
]]> 2019-07-06 04:19:24 UTC https://padlet.com/dhillonramneek/a70ieb1tozz6/wish/370353944 The Coronary System dhillonramneek https://padlet.com/dhillonramneek/a70ieb1tozz6/wish/370354163 From the left atrium,
  • Blood flows through the mitral valve (also known as the bicuspid valve) into the left ventricle.
  • Contraction of the ventricle closes the mitral valve and opens the aortic valve at the entrance to the aorta.
  • The first branches from the aorta occur just beyond the aortic valve still within the heart.
  • Two openings lead to the right and left coronary arteries, which supply blood to the heart itself. Although the coronary arteries arise within the heart, they pass directly out to the surface of the heart and extend down across it. They supply blood to the network of capillaries that penetrate every portion of the heart.
  • The capillaries drain into two coronary veins that empty into the right atrium.
The Systemic Circulation
The remainder of the system is known as the systemic circulation. The graphic shows the major arteries (in bright red) and veins (dark red) of the system. Blood from the aorta passes into a branching system of arteries that lead to all parts of the body. It then flows into a system of capillaries where its exchange functions take place.
Blood from the capillaries flows into venules which are drained by veins.
  • Veins draining the upper portion of the body lead to the superior vena cava.
  • Veins draining the lower part of the body lead to the inferior vena cava.
  • Both empty into the right atrium.
https://www.youtube.com/watch?v=CWFyxn0qDEU
https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book%3A_Biology_(Kimball)/Unit_15%3A_The_Anatomy_and_Physiology_of_Animals/15.03%3A_Circulatory_Systems/15.3A%3A_Anatomy_of_Human_Circulatory_System
]]> 2019-07-06 04:26:36 UTC https://padlet.com/dhillonramneek/a70ieb1tozz6/wish/370354163 Circulatory System Diseases dhillonramneek https://padlet.com/dhillonramneek/a70ieb1tozz6/wish/370354209  Atherosclerosis and coronary artery disease
Atherosclerosis, also known as hardening of the arteries, occurs when plaque builds up on the walls of your arteries and eventually blocks blood flow. Plaque is made of cholesterol, fat, and calcium. 
Coronary artery disease indicates that the plaque buildup in your arteries has caused the arteries to narrow and harden. Blood clots can further block the arteries.

 HEART ATTACK
A heart attack occurs when not enough blood reaches your heart. This can happen due to artery blockage. Heart attacks damage the heart muscle and are medical emergencies.
SYMPTOMS
  • Pain in the center or left side of the chest that feels like mild or severe discomfort, pressure, fullness, or squeezing 
  • pain that radiates from the jaw, shoulder, arm, or across the back
  • shortness of breath
  • sweating
  • nausea
  • irregular heartbeat
  • unconsciousness

https://www.healthline.com/health/circulatory-system-diseases#heart-attacks
]]> 2019-07-06 04:28:19 UTC https://padlet.com/dhillonramneek/a70ieb1tozz6/wish/370354209 ONLINE VIDEO CONTENT dhillonramneek https://padlet.com/dhillonramneek/a70ieb1tozz6/wish/370354529 https://www.youtube.com/watch?v=UMTDmP81mG4
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