Different Differences Between Plants And Animals

According to Reece et al. (2015), animals can be described as organisms that are multicellular, heterotrophic eukaryotes that have tissues made from embryos. The difference between plants and animals are from their source of nutrients. Plants get their food by making them through a process called photosynthesis, which makes plants an autotroph. Animals, on the other hand, get their food by consuming other organisms and ingesting them, which makes them a heterotroph. Besides that, there are also variations in their cell structures. Plant cells have cell walls to protect them from the surrounding where else animals do not have it. The animal kingdom is diverse because there are two ways animals can develop, through protostome development or deuterostome
Animals like hydra that belong to the phylum Cnidarian have two germ layer. Cnidarians can be in two forms, polyp and medusa and the hydra is in the form of polyp. The gastrovascular cavity that is joined to the mouth of the cnidarian acts in digestion, gas exchange and also acts as the hydrostatic skeleton (Sadava et al., 2011). The hydra usually lies on a basal disk, which it uses to move around with the help of mucous secretion. They can move around by somersaulting and attaching itself onto the substrate with its tentacles and then twisting over to the new location. If it detaches itself from the substrate, the hydra is able to float around the area (Raven et al, 2005). Other than that, animals that have an ectoderm, mesoderm and entoderm can be categorized as having three germ layer and these animals have bilateral symmetry. Round worms that belong to the phylum Nematoda are said to have three germ layers. Nematodes generally have unsegmented bodies and they have a thick, flexible cuticle that molts four times as they grow bigger. Their muscles can be found beneath the epidermis and extends along the body of the round worm. Hydrostatic skeleton is formed by the longitudinal muscle pulling against the cuticle and pseudocoel (Raven et al, 2005). Nematodes can move by changing the shape of its fluid filled compartments when muscles are pushing against them. The shape
If the muscle contracts against the hydrostatic skeleton at one side of the nematode, it will result in the animal bending and moving in a coordinated fashion (Freeman, 2002). Not only that, examples of an animal that has an endoskeleton is starfish that belongs to the phylum Echinodermata. Their