 |
| Previous Image | Next Image |
| Description: The gland produces melatonin when the retina is not being stimulated by light. Typically, secretion peaks at about 2 a.m., while we are asleep.
Picture Stats: Views: 69 Filesize: 487.61kB Height: 854 Width: 1691 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=47642 |