301126 Lecture Notes - Lecture 2: Capillary, Tunica Media, Tunica Externa
Document Summary
Found on all external and internal body surfaces. Acts as barriers between the external or between organs and fluid filled cavities. Functions are for protection, immune defences, transport, secretion and sensation. Connective connects all other tissues in the body to one another. 2 types: connective tissue (cid:858)proper(cid:859, loose greater ground substance (gs) to protein ratio. Dermis in skin: regular parallel arrangement. Tendons: elastic dense regular elastic tissue. 2 types: striated, skeletal parallel arrangement. Voluntary control: cardiac only found in heart. Nervous 2 main cells: neurons send and receive messages. Have cell body, axon (impulse from cell to target) and dendrite (receive message from axon to neuron: neuroglial cells anchors neurons in place, speeding up transmissions. Blood vessels: 3 types according to function, 1. Arteries - carry blood away from the heart. Thicker tunica media, narrow lumen, more elastin and collagen fibred: 2.
