What makes an animal a Chordata?
Chordata (biology definition): a phylum of the animal kingdom comprising all the animals that have, at some stage in their life, a notochord (a hollow dorsal nerve cord), pharyngeal slits, and a muscular tail extending past the anus. Includes the subphyla Cephalochordata, Urochordata, and Vertebrata (vertebrates).
What are the 7 classes of phylum Chordata?
The classes of the Phylum Chordata are the Amphibia, the Reptilia, the Fish, the Birds, and the Mammalia. Amphibians include frogs, salamanders, toads, newts, and some less familiar animals, such as caecilians.
What are the five chordate characteristics?
Characteristics of Chordata. Animals in the phylum Chordata share five key chacteristics that appear at some stage during their development: a notochord, a dorsal hollow (tubular) nerve cord, pharyngeal gill arches or slits, a post-anal tail, and an endostyle/thyroid gland (Figure 2).
What is the meaning of chordate?
: any of a phylum (Chordata) of animals having at least at some stage of development a notochord, dorsally situated central nervous system, and gill slits and including the vertebrates, lancelets, and tunicates.
What does the nerve cord do?
The brain and spinal cord are your body’s central nervous system. The brain is the command center for your body, and the spinal cord is the pathway for messages sent by the brain to the body and from the body to the brain.
Is nerve cord and spinal cord same?
a single hollow tract of nervous tissue that constitutes the central nervous system of chordates and develops into the spinal cord and brain in vertebrates.
Where is the nerve cord located in an earthworm?
ii) Nerve cord of earthworm: Nerve cord arises from the sub-pharyngeal ganglia. It extends behind up to the posterior end of body in mid ventral axis beneath the ventral vessel. Both cords appear as a single nerve cord as they are fused and enclosed in a common sheath.
Which organ that protects the main nerve cord is?
Explanation- The backbone or the vertebral column protects the main nerve cord.
Who protects spinal cord?
The spinal cord is protected by bones, discs, ligaments, and muscles. The spine is made of 33 bones called vertebrae. The spinal cord passes through a hole in the center (called the spinal canal) of each vertebra. Between the vertebrae there are discs that act as cushions, or shock absorbers for the spine.
What does the backbone protects?
The spinal cord, a pathway for messages between the brain and the body, is protected by the backbone, or spinal column. The ribs form a cage that shelters the heart and lungs, and the pelvis helps protect the bladder, part of the intestines, and in women, the reproductive organs.
How is the spinal cord protected in our body?
The brain and spinal cord are protected by bony structures — the skull and spinal column. Meninges are membranes that cover and protect the brain and spinal cord.
Why is it important that our spinal cord is protected?
The vertebral column is made up of separate vertebrae that are interconnected and, in the most part, moveable. This allows us to perform tasks such as bending and turning while the spinal cord remains protected.
Which is the highest coordinating Centre of the human body?
brain
What is the control center of the body?
The brain: the control center of the body.
Is the control Centre of the human body?
The brain is the main control centre and interprets all the collected information. The communication between the body and the brain is made through the PNS. The PNS is divided into the somatic and the autonomic nervous system.
Which parts is the control center of the body?
the brain
Why is brain called the control center of the body?
Brain is called the control center of body because it controls every part of the body and transfers signals through nerve cells.
Which is the most important system in our body?
nervous system
What part of your brain controls your thoughts?
frontal lobe