Materials move in and out of cells through…
Diffusion and osmosis
What supplies are carried in circulatory system?
Oxygen, nutrients, sugars, water, salts, metabolic waste
Cyclosis
Circulation of cytoplasm in a unicellular (their circulatory system)
Circulatory systems in Cnidarian
Most cells in contact w/ external environment, direct exchange (Hydra)
Circulatory systems in Annelids
Small pulsating vessels as hearts (earthworm)
Circulatory system in Insects/arthropods
One pulsating vessel, organs bathing in blood (grasshopper), no oxygen in blood
Arteries
Blood AWAY and also BIGGEST higher blood pressure/muscles (always rich in oxygen besides pulmonary artery)
Capillaries
Only one cell thick, gas/nutrient/waste exchange DIFFUUUSE
Veins
TOWARDS HEART lower blood pressure slowly pushes by skeletal muscles (deoxygenated besides pulmonary vein) valves so it goes da rite way
Fish
2 chamber hearts, weak gill capillaries
Amphibians, reptiles, birds, mammals have…
2 circuits (pulmonary and systematic)
Pulmonary circuit
LUNGS TO AND FRO
Systemic
To and fro BODY
Heart in amphibians/reptiles
3 chambered, inefficient b/c oxygen rich and o2 poor blood still mix
Heart in mammals and birds
4 chambered w/ cardiac muscles. two halves to separate oxygenated blood from o2 poor blood
Atrium
Blood returns to heart, top half
Ventricles
Bottom half, blood is pumped out
Valves
Separate atria/ventricles
Septum
Separates oxygenated/deoxygenated blood
Aorta
Largest artery leaving the heart pumps blood to body
Vena cava
Veins leading back into heart (superior/inferior) from body
Pathway of blood flow starting from RA?
RA, RV, pulmonary artery, lungs, p vein, LA, LV, aorta to body, vena cava, RA
Sinoatrial node/pacemaker
Causes the atria to contract through sending impulses and triggers AV node
Atrioventricular node
Causes ventricles to contract