Related by context. Frequent words. (Click for all words.) 75 ventricle 74 left ventricle 67 ventricular 63 blood vessels 59 pulmonary artery 56 muscle fibers 56 aorta 55 carotid arteries 55 coronary arteries 55 coronary artery 54 uterus 54 intestine 54 small intestine 53 intestines 53 diaphragm 53 pancreas 52 lungs 52 arteries 52 nerve fibers 52 electrical impulses 51 capillaries 51 bladder 51 clot 51 cerebellum 50 urethra 50 mitral valve 50 muscle tissue 50 cerebrospinal fluid 50 nerve cells 49 axons 49 neurons 49 esophagus 49 brainstem 49 optic nerve 49 artery 48 endothelial cells 48 abdominal wall 48 adrenal glands 48 arrhythmia 48 trachea 48 malformation 48 heartbeats 48 motor neurons 47 spinal cord 47 abdominal cavity 47 lung 47 carotid artery 47 cortex 47 mitochondria 47 bile duct 47 nerve endings 47 myocardial 47 skeletal muscle 47 cardiomyopathy 47 fibroblasts 47 cortical 47 chest cavity 46 aortic valve 46 systolic 46 cochlea 46 arrhythmias 46 synapse 46 cilia 46 aneurysm 46 circulatory 46 muscles 46 infarction 45 salivary glands 45 intestinal tract 45 internal organs 45 fallopian tubes 45 neutrophils 45 kidneys 45 spinal column 45 brain 45 testes 45 hypothalamus 45 neuron 45 aortic 45 acetylcholine 44 GI tract 44 gland 44 gastrointestinal tract 44 stenosis 44 cell membrane 44 liver 44 prostate gland 44 fatty tissue 44 artery walls 44 ovaries 44 electrical pulses 44 lobes 44 digestive tract 44 thyroid hormone 44 tumors 44 hair follicles 44 venous 44 airway 44 secretion 43 islet cells 43 ovary