Number 1 tendon, which connects muscle to bone
Number 2 ligament connects joints
Number 3 cartilage which stop bones from grinding together
When the concentration gradient of such molecules is high on the either the cytoplasmic side or the extracellular side of the cell. When the concentration gradient is high it flows freely through the cell membrane to the other side without expanding energy.
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Blood is always red, but it looks blue under your skin !
Passive transport processes