Research vessel

Blood pressure is the pressure applied by blood on the walls of blood vessels, it is controlled by a negative feedback system where heart rate and blood volume need to be altered in order to control the pressure. Local negative feedback systems and heart rate is regulated but the cardiovascular centre which also in turn controls neural and hormonal mechanisms. Neurons regulate heart rate and contractility and some neurons inhibit, stimulate or control heart rate by causing constriction which…

The left side of the heart receives oxygenated blood from the lungs and pumps it to the cells and tissues to the body. The blood then returns to the right side of the body this is called systemic circuit. From the heart blood flows through large muscular arteries, then into smaller and smaller arteries, then arterioles and finally to the capillaries. It’s in the capillaries where the diffusion process takes place to exchange molecules of oxygen and nutrients for carbon dioxide of nearby cells,…

11.2 The Circulatory System The circulatory system is made up of multiple different organs, and it's main function is transportation. The system allows blood to circulate, which transports oxygen, hormones and nutrients as well as picking up waste. The elements of the system include; The Heart The heart acts as a muscular pump which is divided into 4 different chambers, the heart's main function is to pump the blood around the body. It pumps deoxygenated blood through the veins, to the…

tissue of the lungs, in order to provide energy for the cells in the body to keep functioning as well as developing. How is the function of transport of materials achieved by these systems? I) Transport of substances at gross level (via big blood vessels) and exchange of substances at the capillary level…

four major blood vessel s that supply blood to the brain, two carotid arteries and two vertebral arteries. These blood vessels join together to form the Circle of Willis at the base of the brain, smaller arteries leave the circle and branch out to supply brain cells with oxygen and nutrients. The artery junction points may become weak, as the artery wall becomes thinner from dilation, the blood flow causes the weakened wall to swell outward causing a ballooning of the blood vessel wall to form a…

released into the bloodstream. Unlike many other cells, red blood cells have no nucleus and can easily change shape, helping them fit through the various blood vessels in your body. However, while the lack of a nucleus makes a red blood cell more flexible, it also limits the life of the cell as it travels through the smallest blood vessels, damaging the cell's membranes and depleting its energy supplies. The red blood cell survives on average only 120 days. Red cells contain a special protein…

Over the years, biologists have carried out experiments to explore the differences in animal hearts. With regards to this experiment at hand, the differences were explored between mammalian and amphibian hearts. This experiment also helps us determine the effects of external, biological factors and pharmacological substances on the contraction of the heart. The following will serve as an overview of the structure and functioning of amphibian heart. A frog heart has three chambers (two atria and…

From the heart, this blood is pumped to the lungs, where carbon dioxide passes into the alveoli to be exhaled. The heart then pumps the oxygen-rich blood through vessels to your cells. As the blood nears cells, it enters capillaries again. Oxygen moves out of the capillaries and into the cells. Cells send carbon dioxide and other wastes through the capillaries into the blood to be carried away. Next, blood flows back…

Tracheasplits out into two tubes which called bronchi that divided into 15-25 airways called bronchioles(2), until the air reaches alveoli that are small sacs in which air exchange. Inside the alveoli, air passes through paper- thin wall to small blood vessels (capillaries). After…

limited to pumping blood. It also needs its own blood supply to be able to perform its several functions. The process of the heart managing its own blood supply is known as coronary circulation. The walls situated in the heart have systemic blood vessels. These exist to meet the needs of the heart for blood supply. Oxygenated blood is brought to the myocardium via the left and right coronary arteries. They are also responsible for bringing the myocardium the needed blood supply by branching off.…