OCTOPUS
Its gills, hearts, digestive system and reproductive glands are all crammed into this one space. The strong muscles in the mantle protect the organs and help with respiration and contraction. The octopus also has a funnel, sometimes called a siphon, which is a tubular opening that serves as a pathway for water.
SHRIMP
Shrimp have 5 pairs of jointed legs on the thorax, 3 pair are used for walking and 2 pair have claws and are used for feeding (some species have 2 for walking and 3 for feeding). On the abdomen, 5 pairs of appendages (swimmerets) are used for swimming and carrying eggs and the tail (telson) is also used when swimming.
Answer:
The body of the shrimp is divided into two main parts: the head and thorax which are fused together to form the cephalothorax, and a long narrow abdomen. The shell which protects the cephalothorax is harder and thicker than the shell elsewhere on the shrimp and is called the carapace. Their head has five segments, their thorax has eight segments, and their abdomen has 6-7 segments. In most species, each segment has a pair of appendages.
the octopus is biIaterally symmetric with two eyes and a beak, with its mouth at the center point of the eight limbs. The soft body can rapidly alter its shape, enabling octopuses to squeeze through small gaps. They trail their eight appendages behind them as they swim. The siphon is used both for respiration and for locomotion. Octopuses have a complex nervous system and excellent sight.
The basic anatomy of the common Octopus, Octopus vulgaris consists mainly of 3 main parts: The arms/appendages, the head and the mantle. The mantle holds all the animal's internal organs. The most noticeable being the large muscular tube called the siphon and also the digestive cecum. The head houses the brain which provides the basis to the nervous system. It also consists of the beak and the opening of the siphon. The tentacles are the parts that contain most of the nervous system which aids in the octopus locomotion and other hunting and feeding strategies as well as for defense.
