THE HEART by https://padlet.com/rnivin/yih8g0rbpy4n Explanation before a heart dissection en-us 2018-05-14 18:39:30 UTC 2025-12-23 15:37:47 UTC hello@padlet.com Heart Dissection rnivin https://padlet.com/rnivin/yih8g0rbpy4n/wish/260603013 At the end of this lesson you will be able to do sheep heart dissection in the lab]]> 2018-05-14 18:42:30 UTC https://padlet.com/rnivin/yih8g0rbpy4n/wish/260603013 The human circulatory system comprises: rnivin https://padlet.com/rnivin/yih8g0rbpy4n/wish/261514484 1.The heart – this is a pump
2.Blood vessels – these carry the blood around the body:
A.Arteries: carry blood Away from the heart and towards the organs
B.Veins: carry blood towards (Into)  the heart and away from other organs
C.Capillaries: carry blood through organs linking the arteries and the veins

3. Blood  – the transport medium 

]]> 2018-05-17 09:59:44 UTC https://padlet.com/rnivin/yih8g0rbpy4n/wish/261514484 The structure of the heart: rnivin https://padlet.com/rnivin/yih8g0rbpy4n/wish/261515430 The heart has 4 chambers
two atria and two ventricles 
the heart has two sides:
the right side consists of right atrium and right ventricle
the left side consists of left atrium and left ventricle
between the two chambers of each side there is a valve to help blood flows in one direction]]> 2018-05-17 10:05:06 UTC https://padlet.com/rnivin/yih8g0rbpy4n/wish/261515430 The structure of the heart is adapted to its function in several ways: rnivin https://padlet.com/rnivin/yih8g0rbpy4n/wish/261516471 1.It is divided into a left side and a right side by a wall of muscle called the septum
•The right ventricle pumps blood only to the lungs while the left ventricle pumps blood to all other parts of the body
•This requires much more pressure – which is why the wall of the left ventricle is much thicker than that of the right ventricle

2. Valves ensure that blood can flow only in one direction through the heart

3. The walls of the atria are thin – they can be stretched to receive blood as it returns to the heart but can contract with enough force to push blood through the bicuspid (mital) and tricuspid valves into ventricles

4. The walls of the heart are made of cardiac muscle, which can contract and then relax continuously without becoming fatigued
]]> 2018-05-17 10:10:26 UTC https://padlet.com/rnivin/yih8g0rbpy4n/wish/261516471 The cardiac cycle rnivin https://padlet.com/rnivin/yih8g0rbpy4n/wish/261517087 2018-05-17 10:13:49 UTC https://padlet.com/rnivin/yih8g0rbpy4n/wish/261517087 The coronary circulation rnivin https://padlet.com/rnivin/yih8g0rbpy4n/wish/261517238 The cardiac muscle has its own blood supply – the coronary circulation.    
Blood reaches the muscle via coronary arteries. These carry blood to capillaries that supply the heart muscle with oxygen and nutrients. blood is returned to the right atrium via coronary veins.]]> 2018-05-17 10:14:36 UTC https://padlet.com/rnivin/yih8g0rbpy4n/wish/261517238 Heat dissection - short movie: rnivin https://padlet.com/rnivin/yih8g0rbpy4n/wish/261517386 https://www.youtube.com/watch?v=XGeo-2iJgc8]]> 2018-05-17 10:15:33 UTC https://padlet.com/rnivin/yih8g0rbpy4n/wish/261517386 הערכה עצמית: rnivin https://padlet.com/rnivin/yih8g0rbpy4n/wish/267401466 ציון 98/100
לוח ברור המכיל את האינפורמציה הדרושה להבנת החומר הנלמד ומוצג באופן ברור עם תמונות וסרטון שמסייעים בביצוע המטלה.]]> 2018-06-15 18:03:25 UTC https://padlet.com/rnivin/yih8g0rbpy4n/wish/267401466 הערכת עמיתים מאת מרגלית מזרחי margalitmizrachi https://padlet.com/rnivin/yih8g0rbpy4n/wish/270423348 ההסברים מאד מפורטים וברורים.
הסרטון מסביר בצורה מפורטת את הכתוב.
 אך יחד עם כל זאת, חסר לי מה התלמיד אמור להגיש בסוף המטלה. 
ז"א האם התלמיד מגיש את ממצאי הדיסקציה של הלב או סדרת צילומים? 
איך את יודעת שהתלמיד עשה את עבודת המעבדה כהלכה?
בהנחה שיש לך 30 תלמידים במעבדה בזמן נתון, ואת אמורה לראות את התהליך שכל תלמיד עושה. 
הערכה שלי היא: 90


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