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In which phylum do you first see muscles and nerves in their simplest form?
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∙ 12y ago
Cnidarians
Wiki User
∙ 12y ago
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Which animal phylum was the first to have a circulatory system?
Annelida
What is the origin of the sense of smell?
The sense of smell originates from the first cranial nerves (the olfactory nerves), which sit at the base of the brain's frontal lobes, right behind the eyes and above the nose. Inhaled airborne chemicals stimulate these nerves.
Why are some nerves called afferent nerves and others are called efferent nerves- how do they differ in function?
Afferent nerves are those that send impulses from the PNS to the CNS. Efferent nerves send impulses from the CNS to the PNS. So the first goes toward the Central Nervous System and the second goes away from it.
When did Phylum Chordata first appear?
About 550 mya underwater, through fish with a backbone.
What phylum is Paramecium?
Paramecium caudatum. Yep, Paramecium is also its first scientific name, or the name of the genus.
How are cnidarians an improvement upon poriferans?
well defined true tissue level of organization first to move having primitive muscles and nerves, becomes first active predator
Is a horse a phylum or class?
First things first: there is no such thing as an "ecological phylum". A phylum is a taxonomic term. Horses are in the Phylum Chordata, and the Subphylum Vertebrata. They are in the Class Mammalia.
What ecological phylum or class is a horse?
First things first: there is no such thing as an "ecological phylum". A phylum is a taxonomic term. Horses are in the Phylum Chordata, and the Subphylum Vertebrata. They are in the Class Mammalia.
What phylum is most closely related phylogenetically to first vertebrates?
The phylum Chordata is most closely related phylogenetically to the first vertebrates. Chordates share a number of characteristics with vertebrates, such as having a notochord, dorsal nerve cord, and pharyngeal slits. Cells within the notochord further develop into the vertebrae that define vertebrates.
Why do you dissect the nerves last in a frog?
Other structures covered the nerves and had to be dissected first
Is it true or false that earthworms and leeches are members of the same phylum?
Yes, it is true. Both Leeches and Earthworms have round bodies and are members of the phylum Annelida. The common name of this phyla is "roundworms". Their body structure is an important evolutionary link as they are the first group of animals with blood vessels. They are also the first segmented animals and have both circular and longitudinal muscles in their body cavity.
I have weak arm's muscles since I am under diabetes and high blood pressure medicineWhat I suppose to do?
Your medicine has made you weak just like it has a whole lot of other people. The first thing you are supposed to do is discuss it with your doctor. After that you will do some weight training and put some resistance against your muscles. You will probably never get to the point where you will stand on a stage. That is not your goal. Your goal is to get stronger arm muscles. You are going to teach different nerves to take over from your damaged nerves so you have more strength. You will join a gym or get rehab where you will learn the proper exercises to exercise your arm muscles and the rest of your body. That process will teach other nerves how to take over and do the job not being done so your muscles will work. A good trainer will know the exercises.
How many pairs of spinal nerves are in the spinal cord?
There are 31 pairs of spinal nerves in the spinal cord.The human peripheral nervous system has 31 pairs of spinal nerves.31there r 31 spinal nerves in a body31There are 31 total spinal nerve pairs8 pairs are cervical nerves12 pairs are thoracic nerves5 pairs are lumbar nerves5 pairs are sacral nervesI know that only adds up to 30. I don't know what the other pair is.31 pairs
Does division or phylum come first?
hi Division is just the alternative for phylum when referring to plants and fungi.
Annelids are the first phylum to exhibit?
segmentation
First phylum to venture into air?
Arthropods.
WHAT kind pf observations did scientists use at first to group organisms into phylum or class?
first scientists grouped organisms into groups . Each group was called phylum. Then they separated each phylum into smaller and smaller groups called class
