Thyroid gland. Illustration of the human thyroid gland,with coloured spheres representing the hormones it produces and those that control it. The thyroid gland,wrapped around the windpipe (bottom) at the front of the neck,consists of two soft lobes (red) joined by a small isthmus. It makes two hormones,triiodothyronine & thyroxine,shown here as yellow spheres,which control the way the body uses chemical energy. The level of these hormones in the blood is delicately controlled by thyroid-stimulating hormone (blue spheres),which is made by the pea-sized pituitary gland (top) in the base of the brain. Upset in the balance of these hormones causes serious illness | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Bavosi, John |
Taille de l’image : | 3720 px × 4814 px |
Model Release : | Non requis |
Property Release : | Non requis |
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