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Investigations of the Circulatory System,[object Object],Presented by: Tiesha Miller and Jillian McClennen,[object Object]
What is the Circulatory System,[object Object],The circulatory system is the network of flexible tubes that carry blood throughout the body. ,[object Object],The circulatory system includes the heart, lungs, arteries, arterioles (small arteries), and capillaries (very tiny blood vessels). ,[object Object],The blood vessels carry oxygen- and nutrient-rich blood throughout the body. ,[object Object]
Continuation...,[object Object],[object Object]
These are the blood vessels that carry oxygen- and nutrient-depleted blood back to the heart and lungs.
The circulating blood brings oxygen and nutrients to all the body's organs and tissues, including the heart itself. ,[object Object]
What is Blood Pressure?,[object Object],[object Object]
The arterioles tighten (or constrict), the heart works harder to pump blood through the smaller space, and the pressure inside the vessels grows. ,[object Object]
Capillaries are tiny vessels with a diameter just about that of a red blood cell. The number of capillaries supplied by a single arteriole is so great that the total cross-sectional area available for the flow of blood is increased. ,[object Object]
Ventricular contraction creates pressure in the arteries. This pressure travels throughout body as a pulse
 the two types of pulses included: Systolic pressure is active pressure and Diastolic pressure is passive pressure.,[object Object]
The development of veins, capillaries, and arteries that control the exchange of oxygen and deoxygenated blood and they also transport heat, and control the blood pressure.,[object Object]
Circulatory system in 5 Representative Animals ,[object Object],Cnideria,[object Object],Nematode,[object Object],Annelida,[object Object],Mollusca,[object Object],Chondrichthye,[object Object]
Tiesha miller and jillian mc clennen  circulatory final
Cnideria,[object Object],Has an open circulatory system. ,[object Object],In this type of system, there is neither a true heart nor capillaries.,[object Object], Blood vessels that act as pumps to force the blood along. ,[object Object]
Continuation,[object Object],These vessels join directly with open sinuses.,[object Object], "Blood," actually a combination of blood and interstitial fluid called 'hemolymph', is forced from the blood vessels into large sinuses, where it actually baths the internal organs.,[object Object]
Nematode,[object Object],In nematodes, there is a circulatory system but they have pseudocoel fluids that accomplish a similar circulation throughout the body.,[object Object]
Annelids,[object Object],have a closed circulatory system with more than one heart that pumps in large vessels that branch into smaller vessels flowing through the organs. ,[object Object],Blood is confined to vessels and interstitial fluid do not fuse, and muscular vessels that function as hearts.,[object Object]
Mollusca- mollusks ,[object Object],[object Object]
blood-filled space is known as a hemocoel ("blood cavity").
In the mollusks, the hemocoel has largely replaced the coelom, which is reduced to a small area around the heart and to the cavities of the organs of reproduction and excretion.,[object Object]
Osteichthyes,[object Object],Osteichthyes have a two chamber heart. They have one atrium & one ventricle. ,[object Object],An atrium receives blood into the heart and drives it into a ventricle for pumping the blood away from the heart. ,[object Object],The ventricle muscular chamber pumps blood out of the heart and into the circulatory system. The pumped blood goes to the gills of the Osteichthyes.,[object Object]
Continued…,[object Object],[object Object]
The capillaries end up converging into arteries that will eventually carry out blood throughout the body and organs. Blood flows through the capillary beds and drops blood pressure. Capillary beds are extremely small blood vessel located within the tissues of the body.
In a cycle, blood flows throughout the body, tissues and organs.,[object Object]
Amphibians and Reptiles,[object Object],Amphibians and Reptiles have a three chamber heart which consists of a right and left ventricle, atrium, systemic circuit and a pulmonary circuit. ,[object Object],In a systemic circuit, blood exits the heart through the aorta, travels through the organs of the body by assistance from the arteries, and then returns to the heart through the systemic veins.,[object Object],[object Object],[object Object]
 A chamber of the heart contracts when an electrical impulse moves across it. These electrical gestures begin in a small parcel of highly specialized cells in the right atrium or the sinoatrial node (SA node), also called the sinus node.
The SA controls how often the heart beats. There are alterations in reactions to emotional and hormonal influences. This also lets the heart rate respond to varying stressors,[object Object]
Humans and Aves,[object Object],[object Object]

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Tiesha miller and jillian mc clennen circulatory final

  • 1.
  • 2.
  • 3.
  • 4. These are the blood vessels that carry oxygen- and nutrient-depleted blood back to the heart and lungs.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9. Ventricular contraction creates pressure in the arteries. This pressure travels throughout body as a pulse
  • 10.
  • 11.
  • 12.
  • 14.
  • 15.
  • 16.
  • 17.
  • 18.
  • 19. blood-filled space is known as a hemocoel ("blood cavity").
  • 20.
  • 21.
  • 22.
  • 23. The capillaries end up converging into arteries that will eventually carry out blood throughout the body and organs. Blood flows through the capillary beds and drops blood pressure. Capillary beds are extremely small blood vessel located within the tissues of the body.
  • 24.
  • 25.
  • 26. A chamber of the heart contracts when an electrical impulse moves across it. These electrical gestures begin in a small parcel of highly specialized cells in the right atrium or the sinoatrial node (SA node), also called the sinus node.
  • 27.
  • 28.
  • 29. They both have 2 atria & 2 ventricles. This gives them the ability to complete separation of oxygenated and deoxygenated blood. This allows an easy access of oxygen to travel through the body and cells. The right side of the heart drives pulmonary circulation while the other dives systemic circulation.
  • 30.
  • 31.
  • 32.
  • 33.