Loading presentation...

Present Remotely

Send the link below via email or IM


Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.


Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Untitled Prezi

No description

Deanna McMichael

on 16 April 2013

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Untitled Prezi

The Circulatory System By: Susan Garcia & Deanna McMichael Bibliography Comparison of circulatory systems (Vertebrates) Transport in Invertebrates Transport in Invertebrates ~The circulatory system connects the aqueous environment of the cell to the "organs that exchange gases, absorb nutrients, and dispose of gases" Mader, Sylvia S. Biology. New York: McGraw-Hill, 2010. Print ~Diffusion is not solely used as it would take to long to transport nutrients throughout multiple layers of cells ~Vital as transport of nutrients is necessary to maintain homeostasis ~Hydras and cnidarians do not have a true circulatory system but gastrovascular cavities
~The cavity is for the digestion and transport of nutrients
~the cavity is two cells thick, the inner lining absorbs nutrients, wastes, and gases ~The outer cell lining gets nutrients through diffusion ~branches extend throughout the body to ensure that diffusion occurs throughout the body Open Systems ~ This type of system is used in lager, multicelluar invertebrates.
~Must contain 3 parts: a circulatory fluid, tubes, and a pump ~Found in insects, arthropods, and some molluscs
~Blood and Intestinal fluids are mixed together forming hemolymph
~The heart or hearts (which are usually elongated and located dorsally) pump hemolymph into the sinuses (space around the organs) where chemical exchange occurs ~When the heart contracts hemolymph is transferred into the ostria (pores)
~ ~This process uses less energy than a closed system
~This is beneficial to molting aquatic arthropods which can use this system for support (like a skeleton) Closed Systems ~ In all vertebrates and some invertebrates ~ must also contain fluid (blood), tubes(blood vessels), and a pump (the heart) ~It requires more energy but supplies more blood at faster rates for larger, active organisms with high metabolic rates
~provides higher blood pressure
~This system contains:
~atria: 1or more chambers that receive blood returning to the heart
~Ventricles: 1 or more chambers that pump blood from the heart
~Arteries: carry blood (which is usually oxygenated) from the heart to the organs
~ arterioles: branch from the arteries, found within organs, supply blood to the capillaries
~capillaries: microscopic and porous
~Capillary beds: networks of capillaries that allow for the diffusion of blood and intestinal fluids
~capillaries converge into venules which converge into veins
~Veins usually return blood from the capillaries to the heart, an exception is the hepatic vein
~All arteries carry blood from the heart to the capillaries Campbell, Niel A.Biology.7th ed. San Francisco: Pearson Education, 2005. Print Connection to Respiratory System and Function of the human heart The superior vena cava and inferior vena cava carry O2 poor blood into the right atrium
~It is then sent through the atrioventricular valve to the right ventricle
~The right ventricle sends it through the pulmonary semilunar valve into the pulmonary trunk
~It then goes into the two pulmonary arteries to the lungs
~ Four Pulmonary veins transport oxygen rich blood to the left atrium
~From the left atrium blood goes to the left ventricle
~From there, blood is sent through the aortic semilunar valve into the aorta and then to the body and tissues
~The capillary beds are responsible for absorbing
O2 and for getting rid of Co2
~Coronary circulation sends blood to the heart ~Not all invertebrates have a circulatory system www.tutorvista.com ~Blood vessels have three layers
~Arteries and veins keep materials from from passing through them; unlike capillaries which are thinner so materials can pass through them.
~The walls of the arteries are made of smooth muscle cells to maintain blood pressure and blood supply Fish ~The blood moves in a single circuit
~The pumping of the heart creates blood pressure
~The blood pressure is reduced after blood passes through the gills
~The heart has two chambers (one ventricular and one atrium)
~Oxygen is picked up during gill circulation
~Blood must pass through two capillary beds which lowers blood pressure and the speed at which the blood travels. This can be increased by the fish's movement. biology-gcse.blogspot.com Amphibians ~Double circulation allows for rigorous blood flow. ~The blood is pumped into the pulmocutaneous circuit which leads to gas exchange ~Three chambered hearts (two atria and one ventricle) sites.google.com Reptiles (not including birds) ~The ventricle is partially divided by a septum which reduces the amount of oxygen-rich and oxygen-poor blood that mix ~Double circulation ~Three chambered heart www.emc.maricopa.edu
Full transcript