capillaries are single and are in direct contact with blood. i know that some veins or arteries have capillaries running through them but some do not right? so for the veins and arteries that don't have veins and arteries running through them, these veins and arteries are composed of...
how does epidermis get oXygen when there no blood vesSels running through it? also if you get a cut to the epidermis but no deeper than the epidermis would the scab turn dark or black or just stay yellow?
do they or can they just use NSAIDs none steroidal anti-inflamatoy drugs, or aspirin or acetaminophen for minor surgery like for muscle biopsy? to stop pain
question about leak channels and action potential. sodium leaks into cells potassium leaks out of cells. potassium is pumped in, sodium is pumped out. but does sodium leak out of cells through leak channels and does potassium leak into cells through leak channels? thanks