The rachis of the fern supports its leaves.
The main axis or central stem of a plant, especially in ferns and grasses.
The bird's feather has a strong rachis.
The central part of a feather from which the barbs extend.
The rachis in the animal's body helps support its structure.
The spine or central axis of certain structures in animals, such as the backbone.
ด้วยพจนานุกรมภาพและแฟลชการ์ดที่ทรงพลังฟรี
