okay guys uh let's go over the heart and the uh blood but first let's go over uh the parts of the heart this is a human heart uh look like this and then uh what happens there are four things i would like you to know uh four chambers four valves and four blood vessels okay four four four four i guess did i say it three times four times anyhow four four four um four valves four blood vessels four chambers of heart i would like you to know and that's it i don't want you know anything extra and that's all you have to know so uh your heart is pretty much the same size as your fist okay so if my heart is probably that size this is a maybe this is as big as a cow's heart or i don't know something else animal but anyhow some other animal so the four chambers of the heart is a right atrium right ventricle left atrium left ventricle right here so right atrium right uh right ventricle left atrium left ventricle so this pointy portion if in doing exam you see something like that and pointed here that would be your left ventricle okay so the four blood vessels that you should know uh these two superior vena cava and inferior vena cava these two i consider them as one for now so this is superior vena cava brings the blood from upper portion of your body above the heart and then anything below the heart the blood is dumped into the ear and blood comes here and of course your skeletal muscle are responsible for this uh they uh your veins of your body embedded within uh within the skeletal muscles so that we do not have a pump to bring the blood into the heart we have a pump pumps the blood into the lungs and to the rest of the body i had a student long time ago he was surprised that we do not have a pump to bring the blood into the heart we do not okay so the four blood vessels uh superior inferior in a cava then aorta it goes to the rest of the body when the heart contracts and that would be your pulmonary artery this pulmonary trunk goes to the left and right lungs right here pulmonary artery and then these two right here pulmonary vein which are the only these two are the only oxygenated vein in the body brings the blood into the heart artery always takes the blood away from heart easy to memorize artery away vein brings blood into the heart okay in this case these are exceptions they are the only veins in the body that are oxygenated and these are the only vein in the body that the only artery i'm sorry these are the only artery in the body that they are deoxygenated anyhow okay so you saw the four uh blood vessels one more time superior vena cava inferior vena cava i consider that as one okay two aorta three uh pulmonary arteries four pulmonary veins okay now if i do a heart surgery open heart surgery when they talk about open heart surgery right here we just did it i just moved a portion of heart this is a septum of the heart it left from right okay the heart sits in your body so this is the right side of your body this is the left side of your body anyhow between the atrium right here between right atrium and right ventricle there is a valve right that valve the white stuff that valve is called right atrioventicular valve right atrioventricular about same say the valve between the left atrium and left ventricle this is left ventricle that valve right here is called left atrioventricular valve that's so far two valves right atrioventricular valve left atrioventricular valve easy to memorize okay then right here that valve when the right side of the bar heart pumps that blood squeeze through here and there is a valve so the blood does not come back to the heart that valve is called pulmonary semilunar valve pulmonary semilunar valve and then this one when the left ventricle squeeze contracts every textbook says contract i say squeeze okay so that is your aortic aortic semilunar valve so the blood does not come back to heart that's a valve it's called aortic semilunar four valve i mentioned right atrioventricular valve left atrioventricular valve pulmonary semilunar valve aortic seminary okay so you should have those pictures as well then the the blood so if this is if this is the red blood cells right here then we have three blood vessels the artists and the biologists did not suffer all the noise as i said we do not make explosions in biology but at least we can make noise okay so right here uh here's the red blood cells by concave you studied that right here and then look like a donut and uh there are three white blood cells that they do have granules inside of them granules granules granules so these are granules inside of i'm going to put that red blood cells inside of the red blood cells inside of the white blood cells inside of white blood cells they're granules these granules are distinguish what they are and then the white bloods these three granulocytes they call them granulocytes because they have granules they are two and a half times of red cells to about two and a half times okay this one does not it has granules but it does it does not pick up acid or base and the most abundant uh most abundant white blood cell in the body this is it that would be neutrophil feel it means love like neutral it means neutral they do not pick up the granules do not become acid-based most abundant white blood cells in the body the least abundant white blood cells in the body is basophil okay they pick up base when they stain them they pick up base okay so they call it basophil and then there are some that's at least abundant and there are some that they pick up acid the granules are orange reddish color the granules so these are acetophyll so these are the three granulocytes that i mentioned then we have two that are a granulocytes right here these two again the artist and the biologists did not communicate very well so they have they are showing you these granules but really they do not have any granules or maybe they meant something else there of course there are particles inside of the cell but lymphocyte if you would it will it does cover most of the cell okay and lymphocyte again the biologist and the artist could not communicate it should be same size as red blood cell almost same size and then monocyte it is three times of red blood cells they are huge monocytes three times of red blood cells and the nucleus is c-shaped okay nucleus is c-shaped on these models uh of course on the granulocytes you should not go by the shape of the nucleus you should go by the granules okay these guys you can go by the nucleus the lymphocytes which is a granulocyte uh the nucleus fills up most of the cell monocyte which is another egg granulocytes the nucleus is c-shaped okay so those are the heart and the blood vessels that i