Your SlideShare is downloading. ×
0
human circulatory system
human circulatory system
human circulatory system
human circulatory system
human circulatory system
human circulatory system
human circulatory system
human circulatory system
human circulatory system
human circulatory system
human circulatory system
human circulatory system
human circulatory system
human circulatory system
human circulatory system
human circulatory system
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

human circulatory system

387

Published on

the human circulatory system explained for grade 11 learners

the human circulatory system explained for grade 11 learners

Published in: Education
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
387
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
30
Comments
0
Likes
1
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. THE HUMAN CIRCULATORY SYSTEM: HEART AND ASSOCIATED VESSELS For Grade 11
  • 2. The circulatory systems has two distinct circuits:   Pulmonary circuit Systemic circuit
  • 3. Pulmonary circuit  The heart pumps deoxygenated blood to the lungs and oxygenated blood back to the heart. Systemic circuit  The heart pumps oxygenated blood to the somatic cells and deoxygenated blood back to the heart.
  • 4.  Connects arteries and veins.  facilitates the exchange of substances in the capillaries and the interstitial tissue fluid.
  • 5. FUNCTIONS OF blood vessels  Arteries: transport oxygenated blood except for the pulmonary artery.  Veins : transports deoxygenated blood except for the pulmonary vein. Other veins:  Renal vein (kidney)  Hepatic vein (liver) Other arteries:  Renal artery (kidney)  Hepatic artery (liver)
  • 6. FUNCTIONS OF blood vessels artery is called the Aorta – pumping oxygenated blood from heart to rest of body.  Main vein is called the vena cava – pumping deoxygenated blood towards the heart from the rest of the body.  Main
  • 7. CIRCULATORY SYSTEM: HEART AND VESSELS     Mammals have a four-chambered heart with two atria and two ventricles The left side of the heart pumps and receives only oxygen-rich blood, while the right side receives and pumps only oxygenpoor blood The mammalian cardiovascular system meets the body’s continuous demand for O2. Blood begins its flow when deoxygenated blood flow from the body into the right atrium.
  • 8. CIRCULATORY SYSTEM: HEART AND VESSELS Blood then flows from the right atrium into the right ventricle through the tricuspid valve. The blood is then pumped into lungs, through the semilunar valve via the pulmonary artery. In the lungs, the blood loads O2 and unloads CO2. Oxygen-rich blood from the lungs enters the heart via the pulmonary vein at the left atrium Blood flows into the left ventricle through the bicuspid valve. This blood is then pumped through semilunar valve into the aorta with takes blood to the entire body.
  • 9. CIRCULATORY SYSTEM: HEART AND VESSELS     Deoxygenated blood returns to the heart through the superior vena cava (blood from head, neck, and forelimbs) and inferior vena cava (this blood is from the trunk and hind limbs) The superior vena cava and inferior vena cava flow into the right atrium. The atrioventricular (AV) valves (tricuspid and bicuspid valves) separate each atrium and ventricle The semilunar valves control blood flow to the aorta and the pulmonary artery.
  • 10. CARDIAC CYCLE cardiac cycle: The heart contracts and relaxes in a rhythmic cycle. Systole: The contraction, or pumping, phase is called… Diastole: The relaxation, or filling, phase. pulse : Is the heart rate, is the number of beats per minute.
  • 11. MAINTAINING THE HEART’S RHYTHMIC BEAT     cardiac muscle cells contract without any signal from the nervous system The sinoatrial (SA) node, or pacemaker, sets the rate and timing at which cardiac muscle cells contract. Impulses from the SA node travel to the Atrioventricular (AV) node At the AV node, the impulses are delayed and then travel to the Purkinje fibers that make the ventricles contract.
  • 12. HEART AND CIRCULATORY SYSTEM DISEASES  Cardiovascular diseases: Atherosclerosis, just one of the many Cardiovascular diseases, are caused by the build-up of plaque (fat) deposits within the arteries.
  • 13. HEART AND CIRCULATORY SYSTEM DISEASES    Heart attack: Is the death of cardiac muscle tissue caused by blockage of one or more coronary arteries. Stroke Is the death of nervous tissue in the brain, usually caused by a rupture or blockage of arteries in the head.. Hypertension: High blood pressure, causes atherosclerosis and gives a high risk of a heart attack and/or a stroke. Hypertension can also be prevented by living a very healthy lifestyle and/or medication.
  • 14. References for slide  Guestbca131b. (2012). Received from slideshare.http://www.slideshare.net/guestbca131b/theheart-and-cardiac-cycle.  Thelawofscience.( 2012) received from slideshare. http://www.slideshare.net/thelawofscience/circulatorysystem-10946147  Medicineppt. (2011). Received from slideshare. http://www.slideshare.net/medicineppt/heart-powerpointpresentation-template  Tctp-cp-science. (2011) received from slideshare. http://www.slideshare.net/tctp-cp-science/circulatorysystem-tctp  Debdstein. (2013). Received from slideshare. http://www.slideshare.net/debdstein/circulation-humanheart-shortened-and-revised

×