Internal anatomy of a spider

Internal anatomy of a spider
Internal anatomy of a spider: arthropod animal with eight legs and an unsegmented body.
Simple eye: non-complex sight organ of a spider.
Poison gland: venom-producing glandular organ of a spider.
Brain: seat of the mental capacities of a spider.
Sucking stomach: sucking part of the digestive tract.
Digestive gland: glandular organ that produces digestive enzymes.
Anterior aorta: first part of the blood vessel that carries the blood from the heart to the organs.
Intestine: last part of the digestive tract.
Heart: blood-pumping organ.
Ovary: egg-producing reproductive organ.
Silk glands: silk-producing glandular organ.
Anus: exit of the digestive tract.
Spinneret: opening through which the spider emits its silk.
Oviduct: passage that carries the eggs.
Seminal receptacle: part of the spider that receives semen.
Lung: respiratory organ of a spider.
Esophagus: first part of the digestive tract.
Poison fang: hard structure with which the spider injects venom.
Poison canal: passage that carries venom.
Chelicera: pair of venomous hooks on the spider's head.

Photo :

EN : Brachypelma auratum
FR : Araignée brachypelma
ES : Brachypelma


Brachypelma is a genus of the family Theraphosidae containing various species of tarantulas. The species are native to parts of Central America. Habitat destruction and pet-trade collection has led these spiders to be among the few arthropods protected under the international cites laws (Convention of trade in endangered species). They are docile tarantulas whose individuals are easy to keep in a terrarium. The most famous species in this genus are the Mexican redknee tarantula B. smithi, curlyhair B. albopilosum, Mexican fireleg B. boehmei, and the Mexican redrump B. vagans. They feed on almost anything smaller than themselves, so while insects and mice are the norm, they may also eat anoles, frogs, and even live minnows if they are offered. These species, like most tarantulas when held in captivity, often become cannibalistic, so individuals must be kept singly, though brief captive introductions of a mate for breeding purposes rarely result in a dead spider, so long as they are separated once they have finished.

These spiders are exceptionally slow growers and have impressive life spans of around 20 years for females. After hatching from a clutch that may vary from 100 to 600 eggs, the spiderlings will molt every two weeks for the first few months, then less and less frequently as they mature. A full-grown Brachypelma may molt as infrequently as once a year.

Animation : Deadly spider bite

Thanks to YouTube for allowing us to watch this video.