Feather development non-nervous. They have a tubular central shaft called the rachis; coming off either side of the rachis are the veins, which have a series of barbs with interlocking connections that are called barbules. The rachis and attached veins make up the spathe. The opposite of the rachis is the calamus, which anchors the feather to the body and is moved by attached dermal muscles. There are many different types of feathers that mostly follow this basic design with few variations based on evolutionary needs. Feathers are sometimes referred to as “elaborate reptile scales” just as birds are sometimes viewed as
Calamus-Wheatland High School Calamus-Wheatland High School Calamus Wheatland High School is a four-year comprehensive high school located in Wheatland, Iowa. The school is part of the Calamus-Wheatland Community School District, and has an enrollment of approximately 120 students in grades nine through 12. Located approximately one mile north of U.S. Highway 30 in Wheatland, Calamus-Wheatland High School draws students from several communities in western and southwestern Clinton County, including Calamus, Wheatland and Toronto; the district also includes a small portion of northwestern Scott County, drawing students from Big Rock and rural areas north and west of Dixon. Calamus-Wheatland came into being in 1986,