• Guards the outflow tract of the right ventricle, and lies above the infundibulum (conus arteriosus).
  
  
• Consists of three semi-lunar cusps namely:

(+) Anterior

(+) Right

(+) Left

• The pulmonary trunk is dilated above each of the semilvnar cusps to form three sinuses of valsava.

• Guards the outlet of the left ventricle
• Found at a lower level than the pulmonary valve

It Consists of three semilunar cusps whose structure is similar to those of the pulmonary cusps. The cusps are named:

• Posterior
• Right
• Left

This guards the left atrioventricular orifice.

It has two cusps

• Anterior cusp (larger)
• Posterior cusp

Two papillary muscles in the left ventricle:

• Anterior
• Posterior

The chordae from each muscle insert into points on both cusps of the mitral valve.

• Guards the right atrioventricular orifice.
  
  

The leaflets of the tricuspid valve are termed:

(+) Septal
(+) Anterior
(+) Posterior

• Leaflets held in place by papillary muscles and their attached chordae tendinae.
  
  
• There are two main papillary muscles – anterior and posterior