Receptors

Perception of information

Euglena (Proctoctist)

Eyespot: mancha ocular

• The Euglena is unique in that it is both heterotrophic (must consume food) and autotrophic (can make its own food).

• Euglena also have an eyespot at the anterior end that detects light, it can be seen near the reservoir.

Wasp ocelli

Caterpillar eye

Compound eyes (multi-lensed)

Some insects can see in the ultra-violet spectrum of light

Camera eyes

Forked tongue : Lengua bífida

• A forked tongue is a tongue split into two distinct tines at the tip; this is a feature common to many species of reptiles. Reptiles smell using the tip of their tongue, and a forked tongue allows them to sense from which direction a smell is coming.

Whiskers : bigotes de gato

Lateral line system

• which detects gentle currents and vibrations, and senses the motion of nearby fish and prey.

• Echolocating: bats can use acoustic landmarks for spatial orientation.

Eardrum, tympanum: tímpano

Insect antennae

Start-nosed mole (topo)

Internal sensory system