![Capillaries Capillaries lack smooth muscle, but contraction/relaxation of circular smooth muscle in upstream metarterioles and precapillary sphincters. - ppt video online download Capillaries Capillaries lack smooth muscle, but contraction/relaxation of circular smooth muscle in upstream metarterioles and precapillary sphincters. - ppt video online download](https://slideplayer.com/slide/4623217/15/images/3/Capillary+cross-section.jpg)
Capillaries Capillaries lack smooth muscle, but contraction/relaxation of circular smooth muscle in upstream metarterioles and precapillary sphincters. - ppt video online download
![In (a) it is displayed the original capillary tube cross-section photo... | Download Scientific Diagram In (a) it is displayed the original capillary tube cross-section photo... | Download Scientific Diagram](https://www.researchgate.net/publication/350774303/figure/fig1/AS:1011749985722371@1618231402382/In-a-it-is-displayed-the-original-capillary-tube-cross-section-photo-and-in-b-the.png)
In (a) it is displayed the original capillary tube cross-section photo... | Download Scientific Diagram
Blood vessels - The circulatory system in humans – WJEC - GCSE Biology (Single Science) Revision - WJEC - BBC Bitesize
Structure and function of blood vessels - Structure and function of arteries, capillaries and veins - Higher Human Biology Revision - BBC Bitesize
Structure and function of blood vessels - Structure and function of arteries, capillaries and veins - Higher Human Biology Revision - BBC Bitesize
![a ) A diagram of a longitudinal section of a blood vessel covered by... | Download Scientific Diagram a ) A diagram of a longitudinal section of a blood vessel covered by... | Download Scientific Diagram](https://www.researchgate.net/publication/261443630/figure/fig1/AS:296784925609984@1447770448742/a-A-diagram-of-a-longitudinal-section-of-a-blood-vessel-covered-by-a-pericyte-b.png)