Receptors that monitor stretch in the articular capsules that enclose synovial joints; they are proprioceptors, mechanoreceptors, and nociceptors; contains at least four receptor types (1) Lamellar Corpuscles, (2) Bulbous Corpuscles, (3) Free Nerve Endings, and (4) Receptors resembling Tendon Organs; together they provide information on joint position and motion.
Puffins are built for swimming underwater rather than for flying, and at the Alaska SeaLife Center in Seward, a mutli-level seabird display allows visitors to watch puffins and other sea birds dive to the bottom of the enclosure for food. When they dive, puffins flap their wings through the water, appearing to fly.
Puffin Habitats. There are three widely known puffin species â the Atlantic puffin, horned puffin and tufted puffin â and while none of them are threatened or endangered, they can be difficult to see in the wild (Note: The rhinoceros auklet is genetically a puffin, but is more frequently classified with auks).