What do you mean by carapace and plastron?

turtle shell structure

(carapace) and a bottom (plastron). The carapace and plastron are bony structures that usually join one another along each side of the body, creating a rigid skeletal box. This box, composed of bone and cartilage, is retained throughout the turtle’s life. Because the shell is an integral part of…

What is called plastron?

The plastron (plural: plastrons or plastra) is the nearly flat part of the shell structure of a turtle, what one would call the belly or ventral surface of the shell. It also includes within its structure the anterior and posterior bridge struts and the bridge of the shell.

What is a plastron in turtles?

The plastron, the order-defining skeletal structure for turtles, provides a bony exoskeleton for the ventral side of the turtle.

What is the difference between the plastron and carapace on a sea turtle?

The carapace is the dorsal part of the shell, while the plastron is the ventral part of the shell in a number of animals, including crustaceans and some vertebrates. Both carapace and plastron are bony structures that work as protective coverings. They join one another along each side of the body.

What is plastron in zoology?

(ˈplæstrən) n. (Zoology) the bony plate forming the ventral part of the shell of a tortoise or turtle.

What is the function of plastron?

The gill (called a ‘plastron’) consists of a stationary layer of air held in place on the body surface by millions of tiny hairs that support a permanent air–water interface, so that the insect never has to renew the gas at the water’s surface.

What is plastron in insects?

The plastron is a series of hairs or bumps on the surface of an aquatic insect. The hairs and bumps are used to trap a thin layer of air against the body of the insect. As the insect breathes the oxygen the thin layer of air is prevented from shrinking due to the action of the hairs and bumps.

What connects the carapace and the plastron?

A bony bridge joins the carapace and the plastron along the side of the turtle. Some turtles have a moveable joint, usually in the plastron, which acts as a “hinge” and allows the turtle to pull the carapace and plastron together tightly, while the turtle retracts its body into the shell.