Yes, 10 I believe.
Yes crayfish have 3 joints
Pleopods
A crayfish has six tail joints, collectively known as the abdomen. These segments, or somites, are often referred to as the pleon and are flexible, allowing the crayfish to swim by flexing and extending its tail. Each segment contributes to the overall structure and movement of the crayfish.
muscle
It has 3 joints.
They have 1,000,000 joints
to move
The main structures of a crayfish under the exoskeleton of the abdomen are the Cephalothorax and the abdomen. The Cephalothorax is made up of the head and thorax and the abdomen has 7 segments.
gills
I do believe the joint in the middle of your leg is your knee.
A human leg typically has three main joints: the hip joint, the knee joint, and the ankle joint. Additionally, there are smaller joints in the foot and between the bones of the lower leg, contributing to overall mobility. In total, when considering all the joints in the leg and foot, there are over a dozen joints involved.
There are three joints in the human leg: the hip joint, the knee joint, and the ankle joint.