Caterpillars have lungs
Article Abstract:
Many caterpillars have lungs which provide blood cells (haemocytes) with oxygen. This finding goes against the conventional view that air reaches insect tissues through a series of branched tubes known as tracheae and tracheoles. The pair of spiracles closest to the rear of many caterpillars are much bigger than the others. One of the tracheae from each of these spiracles gives rise to a branched tuft of trachael branches and tracheoles. The haemolymph becomes oxygenated as it passes through the tufts, which direct it towards the openings into the heart.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
Public 'must have more say on NIH spend'
Article Abstract:
The public should have more say on how the US National Institutes of Health (NIH) spends its $14 billion annual budget, according to an expert panel. The panel has called for the creation of public liaison offices at all 21 institutes and wants to see a more diverse public representation on the director's advisory committee. There need to be changes to the way it communicates with the public about research decisions, creating formal links, to ensure that all will have a say in what gets funded.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
Legume-based cropping systems have reduced carbon and nitrogen losses
Article Abstract:
A 15-year study comparing three distinct maize/soybean agroecosystems to determine the net balances of carbon and nitrogen, is reported. Changes in soil carbon and nitrogen were observed. The use of low carbon-to-nitrogen organic residues to maintain soil fertility, together with diversity in cropping sequences, are suggested to greatly increase soil carbon and nitrogen retention.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Cinderella factors have a ball. Long view from a high plateau
- Abstracts: Are patents and research compatible? Public-sector patents on human DNA
- Abstracts: Games people play with authors' names. Plug-in quantum software. Power play
- Abstracts: Comparison of bait markers for black rats. Multiscale net-site selection by black-capped vireos. Effects of gypsy moth infestation on black bear reproduction and survival
- Abstracts: Unaltered cosmic spherules in a 1.4-Gyr-old sandstone from Finland. Rare-gas solids in the Earth's deep interior