neuromuscular junctions between nerve cells (motor neurons) and a muscle. nerve signals (green) are transmitted from the nerves to the muscle tissue by the neurotransmitter chemical acetylcholine. this signal causes the muscle to contract - 人體細胞 個影片檔及 b 捲影像00:08
animated sequences showing y shaped antibodies sticking to flu viruses during the body's fight against infection. - 人體細胞 個影片檔及 b 捲影像00:29
a single glowing neuron stands out with branching dendrites forming complex links. - 人體細胞 個影片檔及 b 捲影像00:10荷爾蒙