Open circulatory systems
Found in most invertebrates, hemolymph is pumped into an interconnected system of body cavities or sinuses, where it bathes the cells directly
Hemolymph
A mixture of blood and tissue fluid that is the circulating fluid in an open circulatory system
Closed circulatory system
Found in all vertebrates and some invertebrates, tissue fluid surrounds the cells and provides a medium for diffusion of substances from the bloodstream to the cells
Atria (Atrium)
A chamber of the heart that receives blood from the body
Ventricle(s)
A chamber of the heart that pumps blood to the body
What is the diffrence between a open and closed circulatory system?
In a closed circulatory system, blood is contained within a network of blood vessels, separating it from tissue fluids, instead of being mixed with it
Septum
A wall of tissue that divides a body cavity or structure into smaller parts (divides a mammal’s ventricles into two parts)
Pulmonary circuit
The part of the circulatory system that delivers blood to the lungs
Systemic circuit
The part of the circulatory system that delivers blood around the body
Plasma
The fluid portion of the blood that carries all the other parts of the blood like carbon dioxide, dissolved proteins, nutrients, wastes, and hormones
What are the three features commons to all circulatory system?
A fluid that transports materials around the body
A network of tubes to carry the fluid
A pump that pushes the fluid through the tubes
Red Blood Cells (Erythrocytes)
Cells with no nuclei shaped like a biconcave disc that contains hemoglobin that helps it deliver oxygen and carbon dioxide
What are the functions of the circulatory system?
Transports oxygen and carbon dioxide
Delivers nutrients to parts of the body and transports wastes
Maintain body’s temperature
Trasports hormones
Leukocytes
A group of cells that serve as the first line of defense against infections
Granular leukocytes (Neutrophils, eosinophils, basophils)
Uses chemicals that attack and kill microorganisms brought into the cells
Agranular leukocytes (Lympocytes & Monocytes)
Englufs microorganisms and some produces antibodies
Pus
A yellowish-white fluid formed in infected tissue, consisting of white blood cells and cellular debris
Platelet
A cell fragment in the blood that is necessary for blood clotting
Arteries
Carries blood away from the heart (Oxygenated and high in pressure)
Veins
Carries blood to the heart (Deoxygenated and low in pressure)
Capillaries
Blood vessels that connect arteries to veins and support the exchange of nutrients, waste etc.
Cardiac cycle
The heart beat
Systolic pressure
The blood pressure in the arteries when the heart contracts
Diastolic pressure
The blood pressure in the arteies when the heart relaxes
Sinoatrial node
The pacemaker that controls the heart beat through nerves, located at the junction between the superior vena cava and right atrium
Atrioventricular node
Serves as a conductor of nerve impulses, located between right atrium and ventricle
What are the three diffrences between arteries and veins
Pressure
Elasticity of blood vessel
Oxygenated vs deoxygenated
What is present in veins that help blood move
Valves
Lymphatic system
A system that helps regulate blood volume and filter bacteria and other components of the blood
Lymphe node
An enlargement in the lymph vessels that acts as a filter to remove bacteria and foreign particles
Pericardium
Protective sac filled with fluid that lubricates the surface of the heart and root of major blood vessels
Coronary arteries/veins
Blood vessles on the heart that provide it with necessary nutrients
Blood pressure
The force of your blood on the walls of the arteries
Purkinje fiber
A conducting fiber that carries the electrical signals from the AV node to the muscle cells of the ventricles
Chordae Tendineae
Tendons that support the atrioventricular valves
Arteriosclerosis
The loss of elasticity and hardening of the arteries
Plaque (Artherosclerosis/Coronary heart disease)
Deposits of fat, cholesterol, calcium, and other materials on and in the walls of the arteries. Cause of atherosclerosis/coronary heart disease
Angina
Pain in the chest, left shoulder, arm or neck caused by insufficient blood supply
Myocardial infarction (Heart attack)
The death of cardiac muscle tissue due to oxygen deprivation
Angioplasty
A medical procedure that opens up a blocked artery by enlarging narrowed openings
Cholestrol
Bad cholestrol can cause plague to form, but good cholestrol can prevent that