BIO 11 Lecture Notes - Lecture 5: Vasodilation, Collagen, Blood Vessel
Document Summary
Muscle tissues: composed of cells that can contract and generate force with little ecm between the cells (arranged in lines). Their main function is to contract and allow movement. Short, branched cells only found in the heart. Flattened cells, no overlapping of cells and have ovoid nucleus. Function: propel substances in organs/hollow structures under involuntary control (stomach, oesophagus, intestines, blood vessels, ducts of glands) Nervous tissue: makes up the majority of the brain, spinal cord and nerves. It is composed of cells and unique ecm (lack of collagen h&e stain). Major functions are to generate send and receive signals. Neurons: send and receive messages (nerve impulses) Axon: single arm - moving nerve impulse from cell body to target organ. Dendrites: short arms receive messages from axons of other neurons to cell body. Neuroglial cells: anchoring neurons in place, speeding up transmissions, circulating cerebrospinal fluid. Arteries (distribution system): convey blood away from the heart.
