| 词汇 | rhamphotheca |
| 释义 | BETA Examples of rhamphothecarhamphotheca isn’t in the Cambridge Dictionary yet. You can help! The front portion of the lower jaw is down-turned and in combination with the rhamphotheca on the upper jaw, functioned to pluck food. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. By comparison, in most modern birds, the rhamphotheca grows, and is shed, continuously and in some species its color varies depending on the season. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The rhamphotheca grows continuously in most birds and in some species the color varies seasonally. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Two bony projectionsthe upper and lower mandiblesare covered with a thin keratinized layer of epidermis known as the rhamphotheca. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There is a vascular layer between the rhamphotheca and the deeper layers of the dermis, which is attached directly to the periosteum of the bones of the beak. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This covering is called the rhamphotheca. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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