Describe the flow of blood starting with it entering the left atrium and ending with the blood leaving the heart to go to the rest of the body. (Name all major organs/structures that blood flows through/past)
I need help please & thank you!
I need help please & thank you!
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Blood is pumped from the left atrium past the mitral valve into the left ventricle. It then passes through the aortic arch into the rest of the body. This is called the systemic circuit. The aorta branches off into arteries where blood oxygenizes the rest of the body. It comes back up through veins. Deoxygenized blood enters back into the heart through the vena cava.
The next part is called the pulmonary circuit. It enters the right atrium, passes the tricuspid valve, and enters the right ventricle. The ventricle contracts and pumps the deoxygenized blood into the pulmonary artery to the lungs, where the blood picks up more oxygen in the alveoli. The blood enters back into the heart through the pulmonary vein and into the left ventricle.
Good luck!
The next part is called the pulmonary circuit. It enters the right atrium, passes the tricuspid valve, and enters the right ventricle. The ventricle contracts and pumps the deoxygenized blood into the pulmonary artery to the lungs, where the blood picks up more oxygen in the alveoli. The blood enters back into the heart through the pulmonary vein and into the left ventricle.
Good luck!
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The human heart is a specialized, four chambered muscle that maintains blood flow
in the circulatory system.
Four chambers :
Right Atrium
Right Ventricle
Left Ventricle
Left Atrium
Flow of blood through the heart :
Superior and inferior vena cava ---------> right atrium ( separate openings ) ----->
Tricuspid valve ( 3 flaps or 3 cusps, of tissue ) -------> Right Ventricle ------------>
Pulmonary valve or Semilunar valve ( 3 half-moon-shaped flaps ), it prevents backflow
------------> Pulmonary artery -----------> Lungs ( gives up CO2 and receives O2 ) ------------>
Heart's left side through 4 Pulmonary veins ( 2 from each lung ) --------> Left Atrium
-----------> Mitral valve or Bicuspid valve ( 2 flapped valve ) ---------------> Left Ventricle
-----------> As ventricle contracts, the mitral valve prevents backflow of blood into the
left atrium -------------> Aortic Valve ( has a semi-lunar shape and a unidirectional function )
-----------> Aorta ( the major artery that supplies the entire body )
Before birth an additional opening exists in the septum
between the left and right atria of the fetal heart.
This allows the blood to flow directly from the right to the left atrium
without passing through the right ventricle and thus to the lungs, which do not yet function.
After birth, this opening closes.
Additionally, in the fetal heart the ductus arteriosus,
a bridge between the pulmonary artery and the aorta, allows most of the blood to bypass
the collapsed fetal lungs. The ductus arteriosus atrophies shortly after birth.
in the circulatory system.
Four chambers :
Right Atrium
Right Ventricle
Left Ventricle
Left Atrium
Flow of blood through the heart :
Superior and inferior vena cava ---------> right atrium ( separate openings ) ----->
Tricuspid valve ( 3 flaps or 3 cusps, of tissue ) -------> Right Ventricle ------------>
Pulmonary valve or Semilunar valve ( 3 half-moon-shaped flaps ), it prevents backflow
------------> Pulmonary artery -----------> Lungs ( gives up CO2 and receives O2 ) ------------>
Heart's left side through 4 Pulmonary veins ( 2 from each lung ) --------> Left Atrium
-----------> Mitral valve or Bicuspid valve ( 2 flapped valve ) ---------------> Left Ventricle
-----------> As ventricle contracts, the mitral valve prevents backflow of blood into the
left atrium -------------> Aortic Valve ( has a semi-lunar shape and a unidirectional function )
-----------> Aorta ( the major artery that supplies the entire body )
Before birth an additional opening exists in the septum
between the left and right atria of the fetal heart.
This allows the blood to flow directly from the right to the left atrium
without passing through the right ventricle and thus to the lungs, which do not yet function.
After birth, this opening closes.
Additionally, in the fetal heart the ductus arteriosus,
a bridge between the pulmonary artery and the aorta, allows most of the blood to bypass
the collapsed fetal lungs. The ductus arteriosus atrophies shortly after birth.
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left atrium -> mitral valve --> left ventricle -> aortic semi lunar valve--> aorta