circulatory anastomosis

Examples of circulatory anastomosis in the following topics:

• Anastomoses

  • A circulatory anastomosis is a connection or looped interaction between two blood vessels.
  • An anastomosis refers to any join between two vessels.
  • Circulatory anastomoses are named based on the vessels they join: two arteries (arterio-arterial anastomosis), two veins (veno-venous anastomosis), or between an artery and a vein (arterio-venous anastomosis).
  • However, this can only occur if the atheroma progresses slowly, giving the anastomosis time to form.
  • They can be very severe if they result in the bypassing of key tissues by the circulatory system.

• Blood Flow in the Brain

  • Since the brain is very vulnerable to compromises in its blood supply, the cerebral circulatory system has many safeguards.
  • The circle of Willis, a circulatory anastomosis that supplies blood to the brain and surrounding structures while providing redundancy in case of any interruption, is a key protection.

• Development of the Cardiovascular System

  • The circulatory system develops initially via vasculogenesis, with the arterial and venous systems developing from distinct embryonic areas.
  • The development of the circulatory system initially occurs by the process of vasculogenesis, the formation of new blood vessels when there are no preexisting ones.
  • On the obliteration of the stapedial artery, this anastomosis enlarges and forms the internal maxillary artery; the branches of the stapedial artery are now branches of this vessel.

• Open and Closed Circulatory Systems

  • The circulatory system can either be open or closed, depending on whether the blood flows freely in a cavity or is contained in vessels.
  • In a closed circulatory system, blood is contained inside blood vessels, circulating unidirectionally (in one direction) from the heart around the systemic circulatory route, then returning to the heart again.
  • In an open circulatory system, the blood is not enclosed in the blood vessels, but is pumped into a cavity called a hemocoel.
  • Most vertebrates and some invertebrates, such as this annelid earthworm, have a closed circulatory system.
  • Arthropods, such as this bee and most mollusks, have open circulatory systems.

• The Role of the Circulatory System

  • The circulatory systems is a network of blood vessels supplying the body with oxygen and nutrients, while removing carbon dioxide and waste.
  • The circulatory system can be thought of as a highway system that runs throughout the body .
  • At the core of the human circulatory system is the heart .
  • Gas exchange is one essential function of the circulatory system.
  • The heart is central to the human circulatory system, as it pumps blood throughout the body.

• Nerve and Blood Supply

  • The blood supply of a synovial joint comes from the arteries sharing in anastomosis around the joint.

• Types of Circulatory Systems in Animals

  • The circulatory systems of animals differ in the number of heart chambers and the number of circuits through which the blood flows.
  • The circulatory system varies from simple systems in invertebrates to more complex systems in vertebrates.
  • Simple animals consisting of a single cell layer, such as the (a) sponge, or only a few cell layers, such as the (b) jellyfish, do not have a circulatory system.
  • (b) Amphibians have two circulatory routes: one for oxygenation of the blood through the lungs and skin, and the other to take oxygen to the rest of the body.
  • (c) Reptiles also have two circulatory routes; however, blood is only oxygenated through the lungs.

• Introduction to Blood Flow, Pressure, and Resistance

  • The circulatory system is the continuous system of tubes that pumps blood to tissues and organs throughout the body.
  • The circulatory system is the continuous system of tubes through which the blood is pumped around the body.
  • Resistance to flow must be overcome to push blood through the circulatory system.
  • The arterioles and capillary networks are the main regions of the circulatory system that generate resistance, due the small caliber of their lumen.
  • Flow is the movement of the blood around the circulatory system.

• Pressure in the Body

  • One such critical bodily system which relies on pressure for functionality is the circulatory system, which is an example of a closed fluid system under pressure.
  • Blood can be regarded as a viscous liquid contained within the circulatory system that travels throughout this closed system as a result of pressure and pressure differences within the circulatory system.
  • As the volume of blood within the circulatory system is confined to the veins, arteries, and capillaries there is a pressure within this closed system.
  • Any medical conditions affecting any of these factors will have an effect on blood pressure and the overall health of the circulatory system.
  • Explain role played by pressure in the circulatory and respiratory systems

• Blood Vessel Function

  • The circulatory system is transports blood through the body to perform these actions, facilitated by the extensive network of blood vessels.
  • The circulatory system can be split into two sections, systemic and pulmonary.
  • In the systemic circulatory system, highly oxygenated blood (95-100%) is pumped from the left ventricle of the heart and into the arteries of the body.
  • This completes the pulmonary circulatory system.
  • This simplified diagram of the human circulatory system (anterior view) shows arteries in red and veins in blue.