Cross section through a Helianthus stem
Numéro d’image : 11998905
| Cross section through a Helianthus stem showing a vascular bundle. Contained in this is the phloem (small red circles),xylem (larger red circles) & cambium between the two. Phloem is made up of sieve elements placed end to end so as to form a sieve tube; this is responsible for the translocation of organic substances. Xylem is made up of non-living vessels (large hollow tubes made from lignified cells placed end to end) & smaller traechids (elongated lignified cells). This tissue is chiefly responsible for the transport of water & minerals from the roots to the leaves,it also contributes to the strength of the stem along with the collenchyma and sclerenchyma | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Brown, Chuck |
| Taille de l’image : | 3563 px × 2480 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : |
|
Prix pour cette image À partir de 45 €
Produit vendu
(Calendrier, Carte postale, Carte de vœux, Impression sur textile, Packaging etc)
À partir de 45 €
Usage commercial
(Affichage, Annonce presse, Annonce TV, Carte, Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 45 €
Éditorial
(Digital, Journal, Livre, Livre pratique, Magazine, Télévision etc)
À partir de 60 €
Usage non-commercial
(Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 120 €