Chordata
An chordate has an inner skeleton with a backbone. It generally has four appendages that are in the forms of legs, arms, wings or fins. Basic Chordate characteristics are notochord, dorsal hollow nerve cord, postanal tail, segmental muscles, pharyngeal slits and bars ventral heart. Chordate Locomotion: Notochord stiffens the long body axis, pressurized cartilage material bound in fibrous sheath, segmental muscles (myomeres) act on notochord to produce undulating motion, dorsal nerve cord branches to each set of, muscles to coordinate swimming motion, postanal tail and caudal fin add power. Chordate Feeding is very simple.They have a basic pattern which is is filter-feeding. Water passing through pharyngeal slits is strained by bars between them. Cilia move food particles trapped in mucus on pharyngeal bars along ventral and dorsal tracks to stomach. Pharyngeal slits and bars are metameric
Sharks
The muscular system is the system for the strength and speed a shark has. This system helps the tail move back and forth which is the major components for a shark's speed. Red muscle is aerobic and need a lot of oxygen.This muscle contains myoglobin, an oxygen carrying pigment. The red muscle functions as a muscle for when the shark is cruising at slow speeds. A shark's white muscle in anaerobic, so it does not need any oxygen. This muscle helps the shark with sudden bursts of speed for catching and killing prey.
Whales
Like all mammals, whales breathe air, are warm-blooded, nurse their young with milk, and have body hair. The body shape of a whale is fusiform and the fins, are paddle-shaped. The end of the tail is composed of two flukes, which propel the whales by vertical movement, unlike the horizontal movement of a fish tail. Even though whales do not possess fully developed hind limbs, some (such as sperm whales and baleen whales) have hidden rudimentary appendages, which may even have feet and digits. Most species of whale have a dorsal fin.
Human
The human body contains more than 650 individual muscles which are attached to the skeleton, which provides the pulling power for a human to move around. The main job of the muscular system is to provide movement for the body. The muscular system consist of three different types of muscle tissues : skeletal, cardiac, smooth. Each of these different tissues has the ability to contract, which then allows body movements and functions. There are two types of muscles in the system and they are the involuntary muscles, and the voluntary muscles. The muscle in which humans are allowed to control by themselves are called the voluntary muscles and the ones they can control are the involuntary muscles. The heart, or the cardiac muscle, is an example of an involuntary muscle.