Dedicated crosscut saw blades typically have 60 to 80 teeth. These teeth are evenly dispersed around the circumference of the blade and have an alternated tooth bevel, meaning that when you look at the edge of the blade you will see that the teeth lean in alternating directions. An alternative teeth bevel provides a cleaner cut. Additionally, the gullets on the crosscut blade tend to be somewhat shallow.
The reason for the large number of teeth and the narrow gullets is because of the structure of cross grain. As opposed to the rip cut, the cross grain creates small chips. With small chips, achieving cleaner cuts is done by increasing the tooth count. Because of the short grain, the wood being removed is mere dust and does not need large gullets to escape.