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The rachis, the central shaft of a feather, has a lightweight yet sturdy structure that supports the vanes while allowing for flexibility and aerodynamic efficiency. Composed of a hollow, keratin-based material, it minimizes weight without sacrificing strength, enabling birds to achieve flight with agility. Additionally, its segmented design provides attachment points for barbs, which create the necessary surface area for lift and insulation. Overall, the rachis's structure is optimally adapted to enhance the feather's primary functions of flight and temperature regulation.
What else can I help you with?
Use a table to compare the lifecycles of 3 phyla of bryophytes?
the rachis of a fern
What is the study of how an organisms internal structure functions?
Physiology
Is mitochondria a function or a structure?
Mitochondria is a structure used to provide energy for the various functions of the human body, so it is a structure.
Do leaflets have axillary buds associated with them?
Yes, leaflets do not have axillary buds as they are part of a compound leaf structure. Axillary buds are found in the axil of a leaf where a petiole meets a stem, but in compound leaves, the leaflets are attached directly to the rachis and not to the stem.
What is the branch of physiology that studies functions at the tissue level?
Histology is the branch of physiology that studies functions at the tissue level, including the structure and function of tissues within an organism. It focuses on the microscopic structure of tissues and how they contribute to physiological functions.
This structure branches off from the rachis and is similar to branches in a tree?
barb
Rachis is defined as?
Rachis is an extension of a compound leaf or it can be main stem of a compound leaf.
How would you differentiate the rachis of a compound leaf from branch?
is that rachis is (botany) the main shaft of either a compound leaf, head of grain, or fern frond while branch is the woody part of a tree arising from the trunk and usually dividing.
What is rachis in English?
Spine.
What is the central cylinder of a feather?
rachis
What are the kinds of sentences according to functions and structure?
sentences according to functions and structure
What is the rib or shaft of a feather?
A feather has a main shaft, called the rachis.
Wich structure in the male has both reproductive and excretory functions?
The urethra is the male structure which has both reproductive and excretory functions.
What are the structure- functions of a ovum?
barry
How does structure relate to functions?
Cell structure determines cell function
Pass a structure to functions?
Passing Structure to a function:type specifier function-name (structure-variable);
Use a table to compare the lifecycles of 3 phyla of bryophytes?
the rachis of a fern
