Write about!
1. Heart
2. Structure of heart
3. Blood vessels present in heart
4. Define:-
- Artery
- Vein
- Capillary
5. What is blood?
6. Membranes in heart
7. Valves present in heart
8. What is blood pressure? Describe
Answers
Answered by
6
1.Heart is present between the lungs in thoracic cavity slightly tilted to left.Human heart is four-chambered ,i.e. two Auricles and two ventricles each separated by septum.
2. Human heart is four-chambered,i.e. it has four different chambers which are meant to prevent the mixing of oxygenated and deoxygenated blood. The different chambers of the hearts are as follows :
▪AURICLES ( upper chamber) : There are 2 AURICLES or atria, i.e. left and right , separated by an interauricular septum.
▪ VENTRICLES (lower chamber ) The two inferior chambers of the heart are right and left ventricle separated by an interventricular septum.
3.There are 3 main types of blood vessels, which are involved in the blood circulation.
The three blood vessels are ARTERIES , VEINS and CAPILLARIES .
4. Artery - They take up pure blood from the heart to the body , are thick walled and have no valves .
Veins - It transport impure blood from the body tissues to heart . They are thin-walled with valves present to prevent back flow of blood.
Capillaries - They are thin, narrow tubes which connect arteries to veins, allowing exchange of materials between blood and body cells.
5. Blood is a specialised connective tissue consisting plasma and formed elements (i.e. RBC, WBC and platelets) . It helps in transport of nutrients, gases and waste products etc ; regulates body temperature and pH, etc .
6. The peracardium is a thin membrane that encloses the heart and the Base of the great vessels of the heart(aorta,vena cava, pulmonary artery and pulmonary vein).
7. There are 4 valves present in heart -
▪The mitral valve and tricuspid valve which controls the blood from atria to the ventricles.
▪The aortic valve and pulmonary valve which controls blood flow out of the ventricles .
8. The pressure at which blood is pumped around the body by the heart is called blood pressure.
The maximum pressure at which blood leaves the heart through the main artery during contraction phase , is called the systolic pressure .
The minimum pressure in the arteries during the relaxation phase of heart is called the diastolic pressure.
The normal systolic pressure is about 120mm Hg and diastolic pressure is 80 mm Hg .
The blood pressure is measured by sphygmomanometer. High blood pressure is known as high pertension.
keep smiling:-)
2. Human heart is four-chambered,i.e. it has four different chambers which are meant to prevent the mixing of oxygenated and deoxygenated blood. The different chambers of the hearts are as follows :
▪AURICLES ( upper chamber) : There are 2 AURICLES or atria, i.e. left and right , separated by an interauricular septum.
▪ VENTRICLES (lower chamber ) The two inferior chambers of the heart are right and left ventricle separated by an interventricular septum.
3.There are 3 main types of blood vessels, which are involved in the blood circulation.
The three blood vessels are ARTERIES , VEINS and CAPILLARIES .
4. Artery - They take up pure blood from the heart to the body , are thick walled and have no valves .
Veins - It transport impure blood from the body tissues to heart . They are thin-walled with valves present to prevent back flow of blood.
Capillaries - They are thin, narrow tubes which connect arteries to veins, allowing exchange of materials between blood and body cells.
5. Blood is a specialised connective tissue consisting plasma and formed elements (i.e. RBC, WBC and platelets) . It helps in transport of nutrients, gases and waste products etc ; regulates body temperature and pH, etc .
6. The peracardium is a thin membrane that encloses the heart and the Base of the great vessels of the heart(aorta,vena cava, pulmonary artery and pulmonary vein).
7. There are 4 valves present in heart -
▪The mitral valve and tricuspid valve which controls the blood from atria to the ventricles.
▪The aortic valve and pulmonary valve which controls blood flow out of the ventricles .
8. The pressure at which blood is pumped around the body by the heart is called blood pressure.
The maximum pressure at which blood leaves the heart through the main artery during contraction phase , is called the systolic pressure .
The minimum pressure in the arteries during the relaxation phase of heart is called the diastolic pressure.
The normal systolic pressure is about 120mm Hg and diastolic pressure is 80 mm Hg .
The blood pressure is measured by sphygmomanometer. High blood pressure is known as high pertension.
keep smiling:-)
ShivPriya:
is it okay this much only I know
Answered by
10
HUMAN HEART
heart is the organ in the human body that acts as a double pump .
STRUCTURE OF HUMAN HEART
the human heart is divided into four chambers . the upper two chambers are called right and left atrium. and the lower two chambers are called the right and left ventricle.
★ the left atrium receives the oxygenated blood from the lungs via the pulmonary vein.
★ when the left atrium contracts, the oxygenated blood is pumped into the left ventricle.
★ when the left ventricle contracts, the oxygenated blood is forced into the aorta, which transports the blood to all the parts of the body, except the lungs. when oxygenated blood passes through the capillaries of different organs, it gives oxygen to the body cells , along with oxygen , blood also gives the digested food and other dissolved materials to the body cells. at the same time , carbon dioxide which is produced as a waste material during respiration, enters into the blood .
★ From the body tissues , the deoxygenated blood carrying Co2 is pumped back to the heart, into the right atrium , by the vena cava
★ when the right atrium contracts, the deoxygenated blood is pumped into the right ventricle.
★ the oxygenated blood is again sent to the left atrium of the heart by the pulmonary vein for being circulated in the body.
★ the whole process is repeated again and again so as the blood keeps circulating in our body and keep circulating oxygen , digested food and other materials to all parts of the body. this blood also keeps on removing waste products in the form of deoxygenated blood formed in the cells of the body.
right side of the heart pumps blood into the lungs.
left side of the heart pumps blood to the entire body, except the lungs.
BLOOD VESSELS PRESENT IN HEART
In human beings , the organs of circulatory system are heart, arteries, veins, and capillaries.
ARTERIES
★ they carry blood away from the heart to the various organs of the body , at a high pressure.
★ they transport only oxygenated blood except for the pulmonary artery.
★ they have a narrow lumen, do not have valves.
VEINS
★ they transports blood towards the heart from various organs , at a low pressure.
★ they transport only deoxygenated blood except for the pulmonary vein.
★ they have a wide lumen, they have valves to prevent backward flow of the blood.
CAPILLARIES
★ they carry blood from the arteries to the veins.
★ they exchange O2, CO2 , H2O, and salts between the blood and the surrounding tissues.
★ they have a very narrow lumen, do not have valves.
BLOOD
blood is a Red colour connective tissue that circulates in our blood . blood has an extra- cellular matrix called plasma , where RBC , WBC and platelets floats . blood is red becoz of the presence of hemoglobin . hemoglobin is a red pigment , found in RBC.
Following are the functions of blood :-
★ it transports O2 from the lungs to the cells.
★ it fights from diseases and infections.
★ it regulates the body temperature.
★ it carries hormones to different organs of the body.
★ it carries CO2, a waste product , from the body cells to the lungs.
following are the various components of blood :-
★ RBC red blood cells( erythrocytes) carry the O2 from the lungs to all parts of the body.
★ WBC white blood cells ( leucocytes) they fight from infections and protects the body from foreign particles like germs and bacteria.
★ platelets help in the coagulation of blood by releasing the chemicals that clot blood at the time of injury or wound.
★ plasma helps in the transport of food, CO2, wastes, and salts.
MEMBRANES PRESENT IN HEART
heart consists of two membranes: -
an inner serous membrane called the epicardium, and an outer fibrous membrane.
VALVES PRESENT IN HEART
heart needs the valves to regulate the flow of blood, it allows the blood to flow through the heart only in one direction.
heart consists of four valves:-
The mitral valve and the tricuspid valve.it controls flow of blood from the artria to the ventricles.
The aortic valve and the pulmonary valve.which control flow of blood out of the ventricles.
BLOOD PRESSURE
blood pressure is the pressure at which the blood is pumped around the body by the heart .it is always expressed in the form of two factors that are called systolic pressure and diastolic Pressure .
★ systolic pressure is the pressure at which the blood leaves the through the aorta .during the contraction phase.
★ Diastolic Pressure is the minimum pressure in the arteries during the relaxation phase of the heart.
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BEST OF LUCK ;)
#akashmandal.
heart is the organ in the human body that acts as a double pump .
STRUCTURE OF HUMAN HEART
the human heart is divided into four chambers . the upper two chambers are called right and left atrium. and the lower two chambers are called the right and left ventricle.
★ the left atrium receives the oxygenated blood from the lungs via the pulmonary vein.
★ when the left atrium contracts, the oxygenated blood is pumped into the left ventricle.
★ when the left ventricle contracts, the oxygenated blood is forced into the aorta, which transports the blood to all the parts of the body, except the lungs. when oxygenated blood passes through the capillaries of different organs, it gives oxygen to the body cells , along with oxygen , blood also gives the digested food and other dissolved materials to the body cells. at the same time , carbon dioxide which is produced as a waste material during respiration, enters into the blood .
★ From the body tissues , the deoxygenated blood carrying Co2 is pumped back to the heart, into the right atrium , by the vena cava
★ when the right atrium contracts, the deoxygenated blood is pumped into the right ventricle.
★ the oxygenated blood is again sent to the left atrium of the heart by the pulmonary vein for being circulated in the body.
★ the whole process is repeated again and again so as the blood keeps circulating in our body and keep circulating oxygen , digested food and other materials to all parts of the body. this blood also keeps on removing waste products in the form of deoxygenated blood formed in the cells of the body.
right side of the heart pumps blood into the lungs.
left side of the heart pumps blood to the entire body, except the lungs.
BLOOD VESSELS PRESENT IN HEART
In human beings , the organs of circulatory system are heart, arteries, veins, and capillaries.
ARTERIES
★ they carry blood away from the heart to the various organs of the body , at a high pressure.
★ they transport only oxygenated blood except for the pulmonary artery.
★ they have a narrow lumen, do not have valves.
VEINS
★ they transports blood towards the heart from various organs , at a low pressure.
★ they transport only deoxygenated blood except for the pulmonary vein.
★ they have a wide lumen, they have valves to prevent backward flow of the blood.
CAPILLARIES
★ they carry blood from the arteries to the veins.
★ they exchange O2, CO2 , H2O, and salts between the blood and the surrounding tissues.
★ they have a very narrow lumen, do not have valves.
BLOOD
blood is a Red colour connective tissue that circulates in our blood . blood has an extra- cellular matrix called plasma , where RBC , WBC and platelets floats . blood is red becoz of the presence of hemoglobin . hemoglobin is a red pigment , found in RBC.
Following are the functions of blood :-
★ it transports O2 from the lungs to the cells.
★ it fights from diseases and infections.
★ it regulates the body temperature.
★ it carries hormones to different organs of the body.
★ it carries CO2, a waste product , from the body cells to the lungs.
following are the various components of blood :-
★ RBC red blood cells( erythrocytes) carry the O2 from the lungs to all parts of the body.
★ WBC white blood cells ( leucocytes) they fight from infections and protects the body from foreign particles like germs and bacteria.
★ platelets help in the coagulation of blood by releasing the chemicals that clot blood at the time of injury or wound.
★ plasma helps in the transport of food, CO2, wastes, and salts.
MEMBRANES PRESENT IN HEART
heart consists of two membranes: -
an inner serous membrane called the epicardium, and an outer fibrous membrane.
VALVES PRESENT IN HEART
heart needs the valves to regulate the flow of blood, it allows the blood to flow through the heart only in one direction.
heart consists of four valves:-
The mitral valve and the tricuspid valve.it controls flow of blood from the artria to the ventricles.
The aortic valve and the pulmonary valve.which control flow of blood out of the ventricles.
BLOOD PRESSURE
blood pressure is the pressure at which the blood is pumped around the body by the heart .it is always expressed in the form of two factors that are called systolic pressure and diastolic Pressure .
★ systolic pressure is the pressure at which the blood leaves the through the aorta .during the contraction phase.
★ Diastolic Pressure is the minimum pressure in the arteries during the relaxation phase of the heart.
------------------------------------------------------
------------------------------------------------------
BEST OF LUCK ;)
#akashmandal.
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Great answer
Osm ans....
thanks mam and bro durag ;)
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