Year 10 Biology Topic 1 Circulation Flashcards
What are the 3 main components of the circulatory system
Heart
Blood vessels ( arteries,veins,capillaries )
Blood
The - - - - circulation carries blood to and from the lungs
Pulmonary
The - - - - circulation carries blood to and from the rest of the body’s organs
Systemic
The- - - - artery is the only artery to carry - - - - - blood
Pulmonary
Deoxygenated
The pulmonary vein is the only vein to carry - - - -blood
Oxygenated
Summaries facts on arteries
There is 6 facts
Carry blood away from the heart
Blood at high pressure
They have no valves
Thick layers of muscle and elastic
Pulse created by heart pumping and contraction of the heart muscle
Strong walls
Summarise facts on capillaries
There’s 6 facts
Sites of exchange
blood at low pressure
No valves
Very thin walls 1 cell thick
No pulse
Delicate and easily broken
Summarise facts on veins
There’s 6 facts
Carry blood to the heart
Blood at very very low pressure
Valves to stop blood flowing back
Thinner walls with less muscle
No pulse Delicate and
Flexible
Major vessels in circulatory system
Lungs- pulmonary artery- pulmonary vein is the
Heart- coronary artery- coronary vein
Liver- hepatic artery- hepatic vein
Lower organs- iliac artery- iliac vein
Head&brain- carotid artery- jugular vein
Kidneys- renal artery- renal vein
Stomach- gastric artery- hepatic portal vein- hepatic vein
Small intestine- mesenteric artery- hepatic portal vein- hepatic vein
Name parts inside the Heart
Left atrium
Right arptrium
Bicuspid
Tricuspid
Left ventricle right ventricle
Left side of the heart is oxygenated blood
Right side is deoxygenated
What keeps the blood flowing in one direction through the heart
Valves
bicuspid
tricuspid
Explain why the walls of the ventricles are thicker than the atria
Ventricles pump blood around the body at high pressure
