What is a notochord simple definition?
Definition of notochord : a longitudinal flexible rod of cells that in the lowest chordates (such as a lancelet or a lamprey) and in the embryos of the higher vertebrates forms the supporting axis of the body.
What is notochord in biology?
The notochord is an embryonic midline structure common to all members of the phylum Chordata, providing both mechanical and signaling cues to the developing embryo. In vertebrates, the notochord arises from the dorsal organizer and it is critical for proper vertebrate development.
What is a notochord and its function?
The notochord is the defining structure of the chordates, and has essential roles in vertebrate development. It serves as a source of midline signals that pattern surrounding tissues and as a major skeletal element of the developing embryo.
What is an example of notochord?
The spinal cord is protected by the vertebral column and is above the notochord and the gastrointestinal tract is below it. This example is from Wikipedia and may be reused under a CC BY-SA license. However, a few vertebrates, such as the sturgeon and the coelacanth retain the notochord into adulthood.
What is a notochord and what is its purpose?
The notochord is the defining structure of the chordates, and has essential roles in vertebrate development. It serves as a source of midline signals that pattern surrounding tissues and as a major skeletal element of the developing embryo.
Where is the notochord?
the spinal cord
What is a notochord cord?
What is Notochord. Notochord refers to a longitudinal flexible rod of chordates which supports the body. It also occurs in the early embryonic stages of the vertebrates. In adult vertebrates, the notochord becomes a part of the vertebral column, which surrounds the nerve cord.
What is notochord in plants?
The notochord definition is a rod-like structure made of a cartilaginous substance that develops in all chordates at early embryonic stages as a rudimentary backbone.
What is notochord and what is its function?
Definition of notochord : a longitudinal flexible rod of cells that in the lowest chordates (such as a lancelet or a lamprey) and in the embryos of the higher vertebrates forms the supporting axis of the body.
What is a notochord answer?
The notochord is the defining structure of the chordates, and has essential roles in vertebrate development. It serves as a source of midline signals that pattern surrounding tissues and as a major skeletal element of the developing embryo.
What is notochord what is its function Class 9?
Definition of notochord : a longitudinal flexible rod of cells that in the lowest chordates (such as a lancelet or a lamprey) and in the embryos of the higher vertebrates forms the supporting axis of the body.
What is a notochord and where is it found?
The notochord is a flexible rod that runs through Chordate organisms and provides rigid support. The notochord is replaced by the vertebral column in the more derived Chordates, the Vertebrates, and becomes the cartilaginous substance between vertebrae.
What animal has a notochord?
A notochord is characteristic of developing chordates (which comprise amphioxus, tunicates and vertebrates), and, more arguably, is also found in some other animals.
What exactly is notochord?
notochord, flexible rodlike structure of mesodermal cells that is the principal longitudinal structural element of chordates and of the early embryo of vertebrates, in both of which it plays an organizational role in nervous system development. In later vertebrate development, it becomes part of the vertebral column.
What is the notochord in a human?
The notochord is a rod-like embryological structure, which plays a vital role in the development of the vertebrate. Though embryological, remnants of this structure have been observed in the nucleus pulposus of the intervertebral discs of normal adults.
What is notochord and its functions?
The notochord is an embryonic midline structure common to all members of the phylum Chordata, providing both mechanical and signaling cues to the developing embryo. In vertebrates, the notochord arises from the dorsal organizer and it is critical for proper vertebrate development.
What is the significance of the notochord in humans?
Definition of notochord : a longitudinal flexible rod of cells that in the lowest chordates (such as a lancelet or a lamprey) and in the embryos of the higher vertebrates forms the supporting axis of the body.
What is the location of notochord?
The notochord consists of inner, vacuolated cells covered by fibrous and elastic sheaths, lies along the anteroposterior axis (front to back), is usually closer to the dorsal than the ventral surface of the embryo, and is composed of cells derived from the mesoderm.
Does the notochord become the spinal cord?
The notochord is an elastic rod which extends through Chordate organisms, providing rigid support. In the more derived Chordates, the Vertebrates, the notochord is replaced by the vertebral column, and becomes the cartilaginous substance between vertebrae.
What is notochord in human body?
notochord, flexible rodlike structure of mesodermal cells that is the principal longitudinal structural element of chordates and of the early embryo of vertebrates, in both of which it plays an organizational role in nervous system development. In later vertebrate development, it becomes part of the vertebral column.
Where does notochord begin?
The notochord arises from axial mesoderm at about 16 days and is completely formed by the beginning of the fourth week. It defines the longitudinal axis of the embryo, determines the orientation of the vertebral column, and persists as the nucleus pulposus of the intervertebral disks.
Is a notochord a nerve cord?
notochord, flexible rodlike structure of mesodermal cells that is the principal longitudinal structural element of chordates and of the early embryo of vertebrates, in both of which it plays an organizational role in nervous system development. In later vertebrate development, it becomes part of the vertebral column.
What is notochord and spinal cord?
Notochord is a skeletal rod, and nerve cord is a solid strand of nervous tissue. The main difference between notochord and nerve cord is that notochord belongs to the skeleton whereas nerve cord belongs to the central nervous system of chordates.
What is notochord and where is it located?
The nerve cord is a nervous tissue present above the notochord. It is present in the embryonic stage of vertebrates and develops into a brain and spinal cord. The notochord is a cartilaginous skeletal rod present in the embryonic stages of vertebrates and is replaced by a vertebral column.
What are notochord made of?
notochord, flexible rodlike structure of mesodermal cells that is the principal longitudinal structural element of chordates and of the early embryo of vertebrates, in both of which it plays an organizational role in nervous system development. In later vertebrate development, it becomes part of the vertebral column.
