Circulatory System
Carbon dioxide molecules diffuse into the blood because there is a lower concentration in the than in the cells. This is because the blood is always moving, so the carbon dioxide is carried away and does not build up.
The Components of blood plasma are usually about 92% water but it also includes nutrients, hormones, ions, plasma, proteins, and wastes.
Formed elements arise from stem cells on the bone marrow by hematopoieses they include circulating cells and platelets and blood cells which include red cells and white cells.
Blood clotting is used by your body around a wound to protect and help heal the wound once the would is done healing the blood clot will dissolve.
Open circulatory systems move fluid only one way, examples of this would be worms and millipedes.
Closed circulatory systems have fluids such as blood that continuously loop such humans have this type of system.
Amphibians and most reptiles require separate lung circulation due to the fact their heart has two atria that separate lung flow to the body and a single ventricle.
Mammals, birds and crocodiles have a 4 chambered heart like what’s in our bodies two ventricles and
two atriums.
During diastole ventricles relax and atria contract, during systole ventricles contract Contraction of heart muscle works like a natural pacemaker in your body.
Arteries and veins branch to and from all parts of the body either carrying deoxygenated or oxygentated blood .
Arteries carry oxygenated blood and veins carry deoxygenated blood.
Systolic and diastolic numbers are used to measure an persons arterial blood pressure.
Large arteries and veins are composed of 4 materials endothelium, elastic fibers, smooth muscles, and connective tissue.
Through the evolution of our body veins and arteries have become thicker and stronger to withstand our blood pressures.
Blood volume is affected by 4 hormones antidiuretic hormone, aldotesosterone, atrial natriuretic hormone and nitric oxide.
Heart rate increases with physical activity though the nervous system can speed up or slow down your heart rate at any time.
Diseases such as artery clogging due to eating the wrong food will prevent blood flow through the body.
The Components of blood plasma are usually about 92% water but it also includes nutrients, hormones, ions, plasma, proteins, and wastes.
Formed elements arise from stem cells on the bone marrow by hematopoieses they include circulating cells and platelets and blood cells which include red cells and white cells.
Blood clotting is used by your body around a wound to protect and help heal the wound once the would is done healing the blood clot will dissolve.
Open circulatory systems move fluid only one way, examples of this would be worms and millipedes.
Closed circulatory systems have fluids such as blood that continuously loop such humans have this type of system.
Amphibians and most reptiles require separate lung circulation due to the fact their heart has two atria that separate lung flow to the body and a single ventricle.
Mammals, birds and crocodiles have a 4 chambered heart like what’s in our bodies two ventricles and
two atriums.
During diastole ventricles relax and atria contract, during systole ventricles contract Contraction of heart muscle works like a natural pacemaker in your body.
Arteries and veins branch to and from all parts of the body either carrying deoxygenated or oxygentated blood .
Arteries carry oxygenated blood and veins carry deoxygenated blood.
Systolic and diastolic numbers are used to measure an persons arterial blood pressure.
Large arteries and veins are composed of 4 materials endothelium, elastic fibers, smooth muscles, and connective tissue.
Through the evolution of our body veins and arteries have become thicker and stronger to withstand our blood pressures.
Blood volume is affected by 4 hormones antidiuretic hormone, aldotesosterone, atrial natriuretic hormone and nitric oxide.
Heart rate increases with physical activity though the nervous system can speed up or slow down your heart rate at any time.
Diseases such as artery clogging due to eating the wrong food will prevent blood flow through the body.
Blood Flow of the Heart
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve. When the ventricle is full, the tricuspid valve shuts. This prevents blood from flowing backward into the atria while the ventricle contracts. As the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated. The pulmonary vein empties oxygen-rich blood from the lungs into the left atrium of the heart. As the atrium contracts, blood flows from your left atrium into your left ventricle through the open mitral valve. When the ventricle is full, the mitral valve shuts. This prevents blood from flowing backward into the atrium while the ventricle contracts. As the ventricle contracts, blood leaves the heart through the aortic valve, into the aorta and to the body. Got this from http://www.medicinenet.com/heart_how_the_heart_works/page3.htm