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spermatogenesis and oogenesis contrast

DNA and RNA
rna- uracil dna- thymine

Function of spongy bone
stores red bone marrow
function of compact bone
provides a cavity for bone marrow
































































why is foetal circulation different
diverts from lungs to get O2 from mother (blood is already oxygenated)
Liver, because wastes get filtered from the placenta to mothers blood
sliding filament theory



















