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Diversity of light-detecting organs

Diversity of light-detecting organs

Several analogous types of eyes have developed independently through convergent evolution.

Biology

คำหลัก

light-detecting organ, organ of vision, vision, eye, evolution, earthworm, snail, bee, otter, , vesicular eye, compound eye, photosensitive cell, light, visible light, visual image, cornea, iris, sclera, retina, cone cells, rod cells, pupil, optic nerve, crystalline cone, animal, insect, mammal, Mollusca, molluscs, insects, mammals, Ringed worm, Annelida, biology

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The human eye

The eye is one of our most important sense organs. When stimulated by light, electric impulses are produced by its receptors.

The mechanism of vision

The curvature of the lens of the eye changes when we look at a distant or at a near object, to ensure a sharp image.

Vision correction

Concave and convex lenses are used for the correction of short-sightedness and far-sightedness.

หอยทากโรมัน

หอยทากชนิดหนึ่ง ที่แพร่หลาย และนิยมรับประทาน เป็นอาหาร

Cockchafer (Maybug)

The cockchafer (or maybug) is a widespread bug in Europe. Its larvae, known as chafer grubs are considered a pest.

Colour vision deficiency

The inability to differentiate certain shades of colour is called colour vision deficiency.

European honeybee

Honeybees produce a sweet and nutritious substance, honey.

How does it work? – Cinema projector

This animation demonstrates the design and operation of a traditional cinema projector.

Large white butterfly

The large white butterfly is a common species of butterflies, through which we demonstrate the anatomy of butterflies.

Long-tailed mayfly

Larvae of this type of mayflies spend the first three years of their lives in water, their adult lives last for only one day which they use for mating.

Planaria gonocephala

One of the most common types of flatworms.

Southern wood ant

An ant colony consist of a queen, male ants and workers.

Stag beetle

With the example of the stag beetle we demonstrate how insects' muscles function, how insects fly and how they reproduce.

The life cycle of vertebrates

The life cycle of vertebrates starts with the production of the reproductive cells of an individual and ends with the production of the reproductive cells...

The reproduction and development of insects

Based on their life cycle, insects can be grouped into three categories: ametabolous, hemimetabolous or holometabolous insects.

The sense of balance

The position and acceleration of the head is detected by the inner ear.

Ammonites

An extinct group of Cephalopoda, with solid external skeletons. They are excellent index fossils.

European otter

Otters are semi-aquatic predatory mammals.

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