What Are Chordates

When society thinks about starfish, perch, chordate, and fetal pig they become extremely curious about how their bodies operate because of how they are made up. I will give a brief synopsis of all animals before going into major detail about them. According to the online website named dictionary.com, Starfish are any echinoderm of the class Asteroidea, having the body radially arranged, usually in the form of a star, with five or more rays or arms radiating from a central disk; asteroid (dictionary.com). It is known that a chordate is an animal belonging to the phylum Chordata, composed of true vertebrates and animals having a notochord (dictionary.com). According to research, a fetal pig is an animal in the phylum Chordata and class Mammalia (dictionary.com). A perch is known to be a certain kind of fish with very spiny fins (dictionary). Starfish, perch, chordate, and fetal pig are some very interesting animals that possess some exclusive qualities both similar and different.

The respiratory and cardiovascular systems work together to perform the gas exchange function. Without gas exchange function, the cells would die, hence, it is needed for these systems to work together. Through respiratory system, the oxygen enters the body and then it is transported as oxyhaemoglobin to the cells with the help of cardiovascular system. The cardiovascular system also performs the work to transport the waste product carbon dioxide to respiratory system, that evacuates it. Hence, without respiratory system, the oxygen could not enter the body and it could not discharge the carbon dioxide waste. Without cardiovascular system, the oxygen and carbon dioxide could not travel the

It lacks a backbone, but has a nerve cord that runs down its back and a rod that runs the length of its body parallel to the nerve cord that supports the body (notochord). Humans have a notochord as an embryo, but it breaks up and becomes part of the disks that lie between our vertebrae. Also shared with Amphioxus are gill arches, the bar of cartilage associated with each arch and the cartilage that form jaws, ear bones and our voice box.

The respiratory system provides a network of muscles and organs that helps a human breath. It brings in oxygen though inhaling and eliminates carbon dioxide through exhaling.

They have 5 to 7 pairs of gills (leading to gill slits in rays and sharks and covered by operculum in chimaeras). Some have spiracles behind each eye (Skin surface openings leading to respiratory system).

The Anomalocaris did not make it into the next period. Though, it was one of the most fearsome creatures of the whole Cambrian period. It had two compound eyes with claw - jaw - like tipped appendages in front of its’ mouth. These claw like teeth helped the creature eat more than just plant life, with these appendages in front of its’ mouth it could eat other creatures with hard shells and helped it reach further for food.

Distal: (Away from, farther from the origin) The skull is distal from the pelvic bone.

From the beginning of time the simplest of life forms can be linked to those characteristics that human possess. Amphioxus is a small sea dwelling creator that has no eye, ears, or jaw but can be linked to humans by its nerve cord, segmented muscles that aid in movement, notochord that acts like a backbone, and the gill slits just like the ones human embryos possess.

The spinal cord has segments or divisions, they are the cervical, the thoracic, the lumber, the sacral

A chordoma is a rare type of bone tumor that grows along the spine or skull base. Since it originates from stems notochord cell lines, chordomas are normally present in the midline on the axial skeleton and become very difficult to detect during the early stages of life. Generally, 50% of cases occur in the sacrococcygeal region, 35% in Spenoccipital region and 15% in the rest of the column, especially in the 2nd cervical vertebra transverse process level and sinuses. Chordomas represent less than 1% of all tumors of the central nervous system and between 2% and 4% of all primary bone tumors. Each patient has a unique kind of chordoma, consequently, different treatment approaches may be appropriate for different patients. The initial manifestations

The nervous system of sub-class Agnatha is the most primitive of all the Vertebrates. Though they do have what we would call a brain, it is extremely primitive and lacks a cerebellum, which is in charge of motor-control as well as language, attention and processing mental imagery (Neuroscience, 1997) in other Vertebrates. For the sub-class Agnatha, the cerebrum, olfactory bulb and medulla oblongata are small but present while the optic lobe is particularly weak since they have very basic eyes. For example, the Agnatha class creature call the hagfish is nearly blind (Uzwiak, 2014). The brain of this sub-class is located directly at the anterior of the Notochord. Connected nerves branch out to the rest of the body fro

Adult humans lack the post anal tail and notochord, during embryonic stage humans do contain this two hallmark characteristic but loses it. The notochord is replaced by the spine. Humans are classified chordates because during embryonic stage they contain all four hallmark characteristics.

enables the thigh to be abducted and to be rotated towards the center of the body

Origin: it has an extensive origin from the base of the skull to the upper lumbar vertebrae.

The vertebral column, cranium, jaw, ribs, and intramuscular bones make up bony fish’s skeleton. The skeleton gives structure, provides protection and is a site of red blood cell production.