CIRCULATORY SYSTEM , Heart , BLOOD VESSELS OF THE HEART, BLOOD VESSELS ,…
the transportation of nutrients and O and the removal of CO2 and metabolic wastes like ammonia through the blood by transport system.
comprises of heart, blood, blood vessels
circulates throughout the body
and thus helps in transportation of nutrients, O, CO2
mainly carried by blood and lymph
blood is transported by a pumping organ- heart
through- blood vessels
lymph- lymph vessels
1- blood- contained in heart and blood vessels
2- Tissue fluid- occupies space between individual cells
- arteries, veins and capillaries
also called interstitial fluid.3- lymph- within lymph vessels and lymphatic organs
blood circulates in a closed manner all the time.
flow regulated by heart
blood flows through blood vessels- closed circulatory system insects
blood- open spaces
also helps in maintaining body temp.
- open vascular system
blood flows from heart to the body tissues without blood vessels
protecting body from certain diseases and regulating the activities of the body by transporting hormones.
enclosed within protective double layered membrane- pericardium
space filled with pericardial fluid
protects heart from shock, jerks and mechanical stress.
vertically- left and right
horizontally- 2 chambers
Auricles- receiving chambers
as they receive blood
ventricles- distributing chambers
as they pump blood to lungs and blood vessels that distributes to all parts
ventricles- walls are thicker, elastic, bigger
so as to efficiently pump blood
capillaries- finest blood vessels interconnecting arteries and veins
where exchange of H2O, O, CO2, nutrients and waste substances between blood and body tissues take place
heart- made of specialized muscles- cardiac muscles
continuous relaxation and contraction
because of an electric pulse by SA node- sinoatrial node
SA node- sinoatrial node
located- upper right corner of RA
responsible for heart beat
and hence it is caller natural pacemaker of the heart.
mechanical device that is placed surgically in body due to problem or damage in SA node- sinoatrial node
is called as ARTIFICIAL PACEMAKER.
right auricle opening to the right ventricle-
tricuspid valve- 3 cusps or flaps
left auricle opening to left ventricle- bicuspid valve- 2 cusps or flaps
regulate the flow of blood in 1 direction- auricles to ventricles.
RV to pulmonary artery
LV to Aorta (largest artery)
regarded by valves- semi lunar valves
present at the opening
function- blood should not flow back into the ventricles
NOTE-not in this
differences between artery and vein
difference between blood and lymph
matching blood group table
heart relax- filled with blood
contract- blood is pushed out
both 2A and 2V contract and relax together
goes about- 72 times per min
R part- deoxygenated blood
L part- Oxygenated
blood never mixes