Give some evidence that cells of many invertebrates bear molecules on their surface that are specific to the species and even to a partic-ular individual animal.
Animal Diversity
Nematodes are commonly known as roundworms. They are free-living, very tiny organisms. They have an elongated and tubular body. These organisms have a nervous system and are mostly act as parasites to both animals and plants.
Platyhelminthes
Platyhelminthes are also known as "flatworms" because as they are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.
Give some evidence that cells of many invertebrates bear molecules on their surface that are specific to the species and even to a partic-ular individual animal.
The immune system is a complex system important for survival of humans. The white blood cells are the immune cells. It protects the body from foreign invaders. Lymphocytes are a class of leukocytes that includes T cells, natural killer cells, and B cells.
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