Unit 5 Vocab

mandibles

• Paired, jaw-like mouthparts used for biting, chewing, and grinding food.

• Single, flat mouthparts used for sucking nectar.

• Flexible, tube-like structures for drinking liquids.

• Sharp, needle-like appendages for piercing skin.

exoskeleton

• A soft internal structure providing flexibility and movement.

• A hard, external skeleton made of chitin providing protection and structural support; it does not grow and must be shed periodically.

• A fluid-filled cavity that supports the body and allows for movement.

• A temporary outer layer that provides camouflage and protection.

pentaradial symmetry

• A type of symmetry where the body is arranged in three parts around a central axis.

• Radial symmetry in which the body is arranged in five parts around a central axis; echinoderm larvae are bilaterally symmetrical.

• A form of symmetry that is only found in mammals.

• Symmetry that allows organisms to be divided into two identical halves along one plane.

jointed appendages

• Flexible limbs that allow for movement, including legs, antennae, and mouthparts.

• Rigid structures that provide support and stability.

• Segmented limbs that allow for flexible movement, including legs, antennae, and mouthparts.

• Fixed appendages that do not allow for movement.

molting

• The process of shedding the old exoskeleton to allow for a new, larger one to form; also known as ecdysis.

• A method of reproduction in certain species of reptiles.

• The process of growing new limbs after losing them.

• A type of camouflage used by insects.

Cephalothorax

• the fused head and thorax of spiders and other chelicerate arthropods.

• a fused head and thorax of insects

• a separate head and thorax of crustaceans

• the thorax of mammals

chelicerae

• Fang- or pincer-like mouthparts; in many spiders, they are hollow and connected to venom glands.

• A type of antenna found in insects.

• The outer shell of a crustacean.

• A specialized organ for breathing in fish.

ossicles

• Calcium carbonate plates that make up the endoskeleton; in sea urchins, these plates are fused into a rigid shell called a 'test'.

• Small bones found in the human ear that aid in hearing.

• A type of coral structure found in marine environments.

• A term used to describe the outer layer of a sea urchin's body.

metamorphosis

• The process of physical change during development.

• A type of metamorphic rock formation.

• A stage in the life cycle of a butterfly.

• A method of cellular respiration.

tube feet

• Small, flexible, sucker-tipped appendages connected to the water vascular system, used for movement, clinging to surfaces, and manipulating objects.

• Rigid structures used for support and protection in marine animals.

• Long, tentacle-like appendages used for feeding in aquatic organisms.

• Short, stiff projections used for locomotion in terrestrial animals.