Spiracle of a tiger moth. Scanning electron micrograph (SEM) of a spiracle (centre) of a garden tiger moth caterpillar (Arctia caja). Air passes into the spiracle (breathing pore) and is conveyed through the caterpillar's body by a network of tubes called tracheae. The diameter of the tubes becomes ever smaller,until they form tracheoles. In insects,oxygen is not carried in the blood but diffuses across these tracheal tubes directly into each cell. Tracheae are ingrowths of the body wall made of chitin. Spiracles occur in pairs on either side of most body segments. Magnification: x2600 at 6.5x9 inch size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / MICROFIELD SCIENTIFIC LTD |
Bildgröße: | 3534 px × 2567 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |