1. A bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract
   - atrioventricular bundle, bundle of His, atrioventricular trunk

Type of: cardiac muscle, heart muscle

• porousness
• Porphyra
• porphyria
• porphyrin
• Porphyrio
• Porphyrio porphyrio
• porphyritic
• porphyritic rock
• Porphyrula
• Porphyrula martinica
• porphyry
• porpoise
• porpoise oil
• porrect
• porridge
• porringer
• port
• Port Arthur
• Port Jackson fig
• Port Jackson heath
• Port Jackson pine
• Port Louis
• Port Moresby
• port of call
• port of entry